./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:08:51,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:08:51,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:08:51,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:08:51,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:08:51,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:08:51,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:08:51,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:08:51,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:08:51,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:08:51,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:08:51,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:08:51,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:08:51,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:08:51,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:08:51,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:08:51,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:08:51,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:08:51,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:08:51,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:08:51,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:08:51,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:08:51,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:08:51,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:08:51,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:08:51,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:08:51,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:08:51,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:08:51,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:08:51,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:08:51,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:08:51,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:08:51,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:08:51,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:08:51,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:08:51,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:08:51,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:08:51,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:08:51,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:08:51,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:08:51,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:08:51,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:08:51,701 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:08:51,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:08:51,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:08:51,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:08:51,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:08:51,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:08:51,706 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:08:51,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:08:51,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:08:51,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:08:51,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:08:51,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:08:51,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:08:51,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:08:51,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:08:51,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:08:51,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:08:51,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:08:51,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:08:51,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:08:51,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:08:51,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:08:51,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:08:51,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:08:51,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:08:51,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:08:51,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:08:51,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:08:51,713 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:08:51,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:08:51,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:08:51,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:08:51,716 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_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2021-11-07 08:08:51,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:08:52,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:08:52,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:08:52,030 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:08:52,031 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:08:52,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-07 08:08:52,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/data/27091eb7f/8d1528a8c7c6412f9cba4bf983d660f5/FLAG22cf32453 [2021-11-07 08:08:52,713 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:08:52,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-07 08:08:52,731 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/data/27091eb7f/8d1528a8c7c6412f9cba4bf983d660f5/FLAG22cf32453 [2021-11-07 08:08:53,058 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/data/27091eb7f/8d1528a8c7c6412f9cba4bf983d660f5 [2021-11-07 08:08:53,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:08:53,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:08:53,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:08:53,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:08:53,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:08:53,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794028a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53, skipping insertion in model container [2021-11-07 08:08:53,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:08:53,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:08:53,385 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-07 08:08:53,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:08:53,449 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:08:53,469 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-07 08:08:53,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:08:53,514 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:08:53,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53 WrapperNode [2021-11-07 08:08:53,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:08:53,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:08:53,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:08:53,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:08:53,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:08:53,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:08:53,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:08:53,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:08:53,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:08:53,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:08:53,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:08:53,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:08:53,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (1/1) ... [2021-11-07 08:08:53,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:08:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:53,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:08:53,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:08:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:08:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:08:53,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:08:53,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:08:53,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:08:53,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:08:53,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:08:54,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:08:54,164 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 08:08:54,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:08:54 BoogieIcfgContainer [2021-11-07 08:08:54,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:08:54,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:08:54,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:08:54,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:08:54,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:08:53" (1/3) ... [2021-11-07 08:08:54,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6b89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:08:54, skipping insertion in model container [2021-11-07 08:08:54,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:53" (2/3) ... [2021-11-07 08:08:54,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6b89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:08:54, skipping insertion in model container [2021-11-07 08:08:54,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:08:54" (3/3) ... [2021-11-07 08:08:54,177 INFO L111 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2021-11-07 08:08:54,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:08:54,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:08:54,253 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:08:54,263 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:08:54,264 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:08:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:08:54,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:54,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:54,289 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:54,298 INFO L85 PathProgramCache]: Analyzing trace with hash 555623354, now seen corresponding path program 1 times [2021-11-07 08:08:54,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:54,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502758973] [2021-11-07 08:08:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:54,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:54,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:54,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502758973] [2021-11-07 08:08:54,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502758973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:54,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:08:54,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:08:54,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501871670] [2021-11-07 08:08:54,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:08:54,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:08:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:08:54,577 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:54,597 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2021-11-07 08:08:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:08:54,599 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 08:08:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:54,608 INFO L225 Difference]: With dead ends: 39 [2021-11-07 08:08:54,608 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 08:08:54,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:08:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 08:08:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 08:08:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-07 08:08:54,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-07 08:08:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:54,651 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-07 08:08:54,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-07 08:08:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:08:54,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:54,654 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:54,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:08:54,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:54,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2030844390, now seen corresponding path program 1 times [2021-11-07 08:08:54,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:54,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772569573] [2021-11-07 08:08:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:54,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:54,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:54,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772569573] [2021-11-07 08:08:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772569573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:54,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:08:54,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:08:54,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210201315] [2021-11-07 08:08:54,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:08:54,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:08:54,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:08:54,842 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:54,888 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-07 08:08:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:08:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 08:08:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:54,889 INFO L225 Difference]: With dead ends: 22 [2021-11-07 08:08:54,890 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 08:08:54,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 08:08:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-07 08:08:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-07 08:08:54,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-11-07 08:08:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:54,901 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-07 08:08:54,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-07 08:08:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:08:54,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:54,902 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:54,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:08:54,903 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:54,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1779540136, now seen corresponding path program 1 times [2021-11-07 08:08:54,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:54,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231504628] [2021-11-07 08:08:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:54,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:55,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:55,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231504628] [2021-11-07 08:08:55,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231504628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:55,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:08:55,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:08:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405199412] [2021-11-07 08:08:55,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:08:55,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:08:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:55,105 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:55,220 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-07 08:08:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:08:55,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 08:08:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:55,222 INFO L225 Difference]: With dead ends: 33 [2021-11-07 08:08:55,223 INFO L226 Difference]: Without dead ends: 21 [2021-11-07 08:08:55,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-07 08:08:55,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-07 08:08:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-07 08:08:55,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-07 08:08:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:55,243 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-07 08:08:55,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-07 08:08:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:08:55,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:55,245 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:55,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:08:55,246 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1277885066, now seen corresponding path program 1 times [2021-11-07 08:08:55,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:55,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892934189] [2021-11-07 08:08:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:55,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:55,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:08:55,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771074718] [2021-11-07 08:08:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:55,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:55,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:55,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:55,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:08:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:08:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:08:55,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:55,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892934189] [2021-11-07 08:08:55,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:08:55,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771074718] [2021-11-07 08:08:55,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771074718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:55,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:55,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 08:08:55,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100003516] [2021-11-07 08:08:55,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:08:55,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:08:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:08:55,859 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:55,958 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-07 08:08:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:08:55,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 08:08:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:55,963 INFO L225 Difference]: With dead ends: 43 [2021-11-07 08:08:55,963 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 08:08:55,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:08:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 08:08:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-11-07 08:08:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-07 08:08:55,970 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2021-11-07 08:08:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:55,970 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-07 08:08:55,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-07 08:08:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:08:55,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:55,972 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:56,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:56,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:56,190 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:56,190 INFO L85 PathProgramCache]: Analyzing trace with hash 223699948, now seen corresponding path program 2 times [2021-11-07 08:08:56,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:56,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959487432] [2021-11-07 08:08:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:56,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:56,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:08:56,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608399977] [2021-11-07 08:08:56,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:08:56,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:56,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:56,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:56,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:08:56,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:08:56,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:56,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:08:56,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:56,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:56,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959487432] [2021-11-07 08:08:56,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:08:56,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608399977] [2021-11-07 08:08:56,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608399977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:56,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:56,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:08:56,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735431015] [2021-11-07 08:08:56,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:08:56,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:08:56,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:08:56,519 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:56,631 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-07 08:08:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:08:56,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 08:08:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:56,635 INFO L225 Difference]: With dead ends: 28 [2021-11-07 08:08:56,635 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 08:08:56,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:08:56,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 08:08:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-07 08:08:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-07 08:08:56,655 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-11-07 08:08:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:56,655 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-07 08:08:56,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-07 08:08:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:08:56,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:56,657 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:56,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 08:08:56,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:56,878 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 280518958, now seen corresponding path program 3 times [2021-11-07 08:08:56,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:56,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733446198] [2021-11-07 08:08:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:56,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:56,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:08:56,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682902853] [2021-11-07 08:08:56,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:08:56,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:56,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:56,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:56,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:08:57,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:08:57,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:08:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:08:57,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:57,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733446198] [2021-11-07 08:08:57,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:08:57,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682902853] [2021-11-07 08:08:57,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682902853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:57,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:57,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:08:57,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470078498] [2021-11-07 08:08:57,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:08:57,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:57,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:08:57,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:08:57,233 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:57,332 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-11-07 08:08:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:08:57,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 08:08:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:57,335 INFO L225 Difference]: With dead ends: 49 [2021-11-07 08:08:57,335 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 08:08:57,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:08:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 08:08:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-11-07 08:08:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-07 08:08:57,356 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2021-11-07 08:08:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:57,357 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-07 08:08:57,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-07 08:08:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:08:57,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:57,360 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:57,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:57,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:57,582 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:57,582 INFO L85 PathProgramCache]: Analyzing trace with hash -102020720, now seen corresponding path program 4 times [2021-11-07 08:08:57,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:57,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852657000] [2021-11-07 08:08:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:57,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:57,593 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:08:57,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968114207] [2021-11-07 08:08:57,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:08:57,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:57,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:57,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:08:57,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:08:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:08:57,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:08:57,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:57,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852657000] [2021-11-07 08:08:57,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:08:57,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968114207] [2021-11-07 08:08:57,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968114207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:57,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:57,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:08:57,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488482981] [2021-11-07 08:08:57,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:08:57,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:08:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:08:57,984 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:58,143 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-07 08:08:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:08:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 08:08:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:58,145 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:08:58,145 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 08:08:58,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:08:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 08:08:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-07 08:08:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-07 08:08:58,151 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2021-11-07 08:08:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:58,151 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-07 08:08:58,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-07 08:08:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:08:58,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:58,153 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:58,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:58,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:58,386 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash 795569618, now seen corresponding path program 5 times [2021-11-07 08:08:58,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:58,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670756765] [2021-11-07 08:08:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:58,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:58,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:08:58,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628470354] [2021-11-07 08:08:58,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:08:58,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:58,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:58,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:08:58,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-07 08:08:58,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 08:08:58,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:58,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-07 08:08:58,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:08:58,738 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 49 treesize of output 29 [2021-11-07 08:08:58,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:58,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:58,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 70 [2021-11-07 08:08:59,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:08:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:08:59,240 INFO L354 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2021-11-07 08:08:59,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 128 treesize of output 76 [2021-11-07 08:08:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:08:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:08:59,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:01,254 INFO L354 Elim1Store]: treesize reduction 4489, result has 5.3 percent of original size [2021-11-07 08:09:01,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 89 case distinctions, treesize of input 589 treesize of output 456 [2021-11-07 08:09:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:01,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 118 [2021-11-07 08:09:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 110 [2021-11-07 08:09:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:01,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:01,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:01,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:01,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:01,606 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-07 08:09:01,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 256 treesize of output 112 [2021-11-07 08:09:02,694 INFO L354 Elim1Store]: treesize reduction 346, result has 3.1 percent of original size [2021-11-07 08:09:02,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 98 treesize of output 44 [2021-11-07 08:09:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:02,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:02,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670756765] [2021-11-07 08:09:02,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:02,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628470354] [2021-11-07 08:09:02,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628470354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:02,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:02,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-07 08:09:02,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996378462] [2021-11-07 08:09:02,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:09:02,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:09:02,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:09:02,771 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:03,527 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-07 08:09:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:09:03,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 08:09:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:03,529 INFO L225 Difference]: With dead ends: 48 [2021-11-07 08:09:03,529 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:09:03,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:09:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:09:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-11-07 08:09:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-07 08:09:03,537 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2021-11-07 08:09:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:03,540 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-07 08:09:03,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-07 08:09:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:09:03,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:03,542 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:03,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:03,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:03,765 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:03,766 INFO L85 PathProgramCache]: Analyzing trace with hash -95464140, now seen corresponding path program 6 times [2021-11-07 08:09:03,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:03,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119064137] [2021-11-07 08:09:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:03,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:03,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:03,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635895746] [2021-11-07 08:09:03,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:09:03,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:03,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:03,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:09:04,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-07 08:09:04,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:09:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:04,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:04,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119064137] [2021-11-07 08:09:04,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:04,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635895746] [2021-11-07 08:09:04,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635895746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:04,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:04,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 08:09:04,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577887156] [2021-11-07 08:09:04,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:09:04,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:04,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:09:04,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:09:04,179 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:04,378 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-11-07 08:09:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:09:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 08:09:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:04,379 INFO L225 Difference]: With dead ends: 64 [2021-11-07 08:09:04,380 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 08:09:04,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:09:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 08:09:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2021-11-07 08:09:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-07 08:09:04,389 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 28 [2021-11-07 08:09:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:04,390 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-07 08:09:04,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-07 08:09:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:09:04,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:04,391 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:04,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:04,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:04,606 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:04,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash 91457940, now seen corresponding path program 7 times [2021-11-07 08:09:04,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:04,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582699962] [2021-11-07 08:09:04,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:04,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:04,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:04,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829530621] [2021-11-07 08:09:04,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:09:04,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:04,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:04,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:04,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:09:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:04,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:09:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:05,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:05,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582699962] [2021-11-07 08:09:05,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:05,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829530621] [2021-11-07 08:09:05,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829530621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:05,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:05,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 08:09:05,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188978424] [2021-11-07 08:09:05,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:09:05,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:09:05,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:09:05,050 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:05,209 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-11-07 08:09:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:09:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 08:09:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:05,211 INFO L225 Difference]: With dead ends: 67 [2021-11-07 08:09:05,211 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 08:09:05,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:09:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 08:09:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-11-07 08:09:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-07 08:09:05,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2021-11-07 08:09:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:05,221 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-07 08:09:05,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-07 08:09:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:09:05,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:05,223 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:05,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:05,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:09:05,424 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1493491594, now seen corresponding path program 8 times [2021-11-07 08:09:05,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:05,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450916957] [2021-11-07 08:09:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:05,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:05,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:05,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961720671] [2021-11-07 08:09:05,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:05,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:05,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:05,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:05,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:09:05,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:09:05,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:05,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 08:09:05,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:05,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-07 08:09:05,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:05,873 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 49 treesize of output 29 [2021-11-07 08:09:06,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 70 [2021-11-07 08:09:06,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:06,242 INFO L354 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2021-11-07 08:09:06,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 08:09:06,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:06,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:06,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:06,486 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-07 08:09:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 104 treesize of output 105 [2021-11-07 08:09:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:07,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:09,828 INFO L354 Elim1Store]: treesize reduction 5155, result has 8.3 percent of original size [2021-11-07 08:09:09,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 118 case distinctions, treesize of input 611 treesize of output 684 [2021-11-07 08:09:11,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 543 treesize of output 391 [2021-11-07 08:09:11,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:11,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 434 treesize of output 264 [2021-11-07 08:09:12,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:12,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:12,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:12,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:12,319 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-07 08:09:12,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 396 treesize of output 266 [2021-11-07 08:09:14,234 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-07 08:09:14,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 157 treesize of output 77 [2021-11-07 08:09:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:14,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:14,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450916957] [2021-11-07 08:09:14,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:14,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961720671] [2021-11-07 08:09:14,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961720671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:14,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:14,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-07 08:09:14,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562694626] [2021-11-07 08:09:14,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:09:14,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:09:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:09:14,318 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:15,437 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-11-07 08:09:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:09:15,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 08:09:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:15,438 INFO L225 Difference]: With dead ends: 70 [2021-11-07 08:09:15,439 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 08:09:15,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:09:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 08:09:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-11-07 08:09:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-07 08:09:15,452 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 30 [2021-11-07 08:09:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:15,452 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-07 08:09:15,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-07 08:09:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:09:15,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:15,454 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:15,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:15,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:15,670 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:15,670 INFO L85 PathProgramCache]: Analyzing trace with hash -344237208, now seen corresponding path program 1 times [2021-11-07 08:09:15,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:15,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710955632] [2021-11-07 08:09:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:15,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:15,689 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:15,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301942095] [2021-11-07 08:09:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:15,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:15,690 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:15,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:09:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:16,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 08:09:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:16,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-07 08:09:16,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:16,196 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 49 treesize of output 29 [2021-11-07 08:09:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2021-11-07 08:09:16,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:16,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:16,515 INFO L354 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2021-11-07 08:09:16,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 128 treesize of output 76 [2021-11-07 08:09:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:16,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:18,217 INFO L354 Elim1Store]: treesize reduction 4494, result has 5.2 percent of original size [2021-11-07 08:09:18,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 89 case distinctions, treesize of input 591 treesize of output 453 [2021-11-07 08:09:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 110 [2021-11-07 08:09:18,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:09:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 139 [2021-11-07 08:09:18,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:18,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:18,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:18,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:18,616 INFO L354 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2021-11-07 08:09:18,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 268 treesize of output 161 [2021-11-07 08:09:18,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:18,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710955632] [2021-11-07 08:09:18,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:18,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301942095] [2021-11-07 08:09:18,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~index~0] [2021-11-07 08:09:18,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:18,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 08:09:18,879 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-07 08:09:18,879 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 08:09:18,888 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:09:18,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:19,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:09:19,102 INFO L731 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1, 1] [2021-11-07 08:09:19,105 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:09:19,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:09:19 BoogieIcfgContainer [2021-11-07 08:09:19,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:09:19,140 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:09:19,140 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:09:19,141 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:09:19,141 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:08:54" (3/4) ... [2021-11-07 08:09:19,148 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:09:19,148 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:09:19,149 INFO L168 Benchmark]: Toolchain (without parser) took 26081.62 ms. Allocated memory was 92.3 MB in the beginning and 182.5 MB in the end (delta: 90.2 MB). Free memory was 57.1 MB in the beginning and 107.0 MB in the end (delta: -49.9 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. [2021-11-07 08:09:19,150 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory was 64.7 MB in the beginning and 64.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:09:19,151 INFO L168 Benchmark]: CACSL2BoogieTranslator took 446.37 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 56.8 MB in the beginning and 94.3 MB in the end (delta: -37.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 08:09:19,151 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.33 ms. Allocated memory is still 119.5 MB. Free memory was 94.3 MB in the beginning and 92.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:09:19,152 INFO L168 Benchmark]: Boogie Preprocessor took 45.67 ms. Allocated memory is still 119.5 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:09:19,152 INFO L168 Benchmark]: RCFGBuilder took 539.41 ms. Allocated memory is still 119.5 MB. Free memory was 90.8 MB in the beginning and 79.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:09:19,156 INFO L168 Benchmark]: TraceAbstraction took 24971.48 ms. Allocated memory was 119.5 MB in the beginning and 182.5 MB in the end (delta: 62.9 MB). Free memory was 79.7 MB in the beginning and 107.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2021-11-07 08:09:19,156 INFO L168 Benchmark]: Witness Printer took 7.78 ms. Allocated memory is still 182.5 MB. Free memory was 107.8 MB in the beginning and 107.0 MB in the end (delta: 819.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:09:19,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory was 64.7 MB in the beginning and 64.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 446.37 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 56.8 MB in the beginning and 94.3 MB in the end (delta: -37.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.33 ms. Allocated memory is still 119.5 MB. Free memory was 94.3 MB in the beginning and 92.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.67 ms. Allocated memory is still 119.5 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 539.41 ms. Allocated memory is still 119.5 MB. Free memory was 90.8 MB in the beginning and 79.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24971.48 ms. Allocated memory was 119.5 MB in the beginning and 182.5 MB in the end (delta: 62.9 MB). Free memory was 79.7 MB in the beginning and 107.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Witness Printer took 7.78 ms. Allocated memory is still 182.5 MB. Free memory was 107.8 MB in the beginning and 107.0 MB in the end (delta: 819.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L31] COND FALSE !(!cond) [L44] int array1[ARR_SIZE] ; [L45] int array2[ARR_SIZE] ; [L46] int count = 0, num = -1 ; [L47] signed long long sum = 0 ; [L48] int temp ; [L49] short index ; [L51] count=0 [L51] COND TRUE count main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> 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 -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2021-11-07 08:09:22,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:09:22,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:09:22,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:09:22,894 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:09:22,895 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:09:22,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-07 08:09:22,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/data/f68cc5a2d/6f66968b1f2840c286fd36bf3487ce89/FLAGed890c2eb [2021-11-07 08:09:23,635 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:09:23,636 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-07 08:09:23,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/data/f68cc5a2d/6f66968b1f2840c286fd36bf3487ce89/FLAGed890c2eb [2021-11-07 08:09:23,958 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/data/f68cc5a2d/6f66968b1f2840c286fd36bf3487ce89 [2021-11-07 08:09:23,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:09:23,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:09:23,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:09:23,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:09:23,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:09:23,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:09:23" (1/1) ... [2021-11-07 08:09:23,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408dc8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:23, skipping insertion in model container [2021-11-07 08:09:23,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:09:23" (1/1) ... [2021-11-07 08:09:23,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:09:24,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:09:24,188 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-07 08:09:24,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:09:24,250 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:09:24,308 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-07 08:09:24,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:09:24,381 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:09:24,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24 WrapperNode [2021-11-07 08:09:24,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:09:24,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:09:24,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:09:24,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:09:24,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:09:24,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:09:24,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:09:24,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:09:24,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:09:24,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:09:24,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:09:24,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:09:24,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (1/1) ... [2021-11-07 08:09:24,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:09:24,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:24,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:09:24,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:09:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 08:09:24,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:09:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 08:09:24,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:09:24,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:09:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:09:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 08:09:25,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:09:25,267 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 08:09:25,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:25 BoogieIcfgContainer [2021-11-07 08:09:25,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:09:25,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:09:25,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:09:25,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:09:25,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:09:23" (1/3) ... [2021-11-07 08:09:25,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412503f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:25, skipping insertion in model container [2021-11-07 08:09:25,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:24" (2/3) ... [2021-11-07 08:09:25,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412503f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:25, skipping insertion in model container [2021-11-07 08:09:25,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:25" (3/3) ... [2021-11-07 08:09:25,281 INFO L111 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2021-11-07 08:09:25,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:09:25,289 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:09:25,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:09:25,390 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:09:25,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:09:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:09:25,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:25,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:25,431 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 555623354, now seen corresponding path program 1 times [2021-11-07 08:09:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:09:25,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301176112] [2021-11-07 08:09:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:25,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:09:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:09:25,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:09:25,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 08:09:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 08:09:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:25,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:09:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:25,773 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:09:25,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301176112] [2021-11-07 08:09:25,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301176112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:25,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:25,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:09:25,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393749283] [2021-11-07 08:09:25,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:09:25,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:09:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:09:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:09:25,811 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:25,830 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2021-11-07 08:09:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:09:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 08:09:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:25,842 INFO L225 Difference]: With dead ends: 39 [2021-11-07 08:09:25,842 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 08:09:25,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:09:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 08:09:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 08:09:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-07 08:09:25,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-07 08:09:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-07 08:09:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-07 08:09:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:09:25,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:25,891 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:25,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:26,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:09:26,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2030844390, now seen corresponding path program 1 times [2021-11-07 08:09:26,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:09:26,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563201658] [2021-11-07 08:09:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:26,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:09:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:09:26,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:09:26,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 08:09:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:09:26,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:26,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:09:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:26,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:09:26,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563201658] [2021-11-07 08:09:26,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563201658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:26,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:26,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 08:09:26,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652631240] [2021-11-07 08:09:26,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:09:26,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:09:26,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:09:26,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:26,566 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:26,643 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-07 08:09:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 08:09:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:26,646 INFO L225 Difference]: With dead ends: 22 [2021-11-07 08:09:26,647 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 08:09:26,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:09:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 08:09:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-07 08:09:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-07 08:09:26,655 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-11-07 08:09:26,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:26,655 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-07 08:09:26,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:26,656 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-07 08:09:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:09:26,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:26,657 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:26,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:26,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:09:26,858 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1779540136, now seen corresponding path program 1 times [2021-11-07 08:09:26,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:09:26,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147574036] [2021-11-07 08:09:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:26,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:09:26,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:09:26,871 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:09:26,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 08:09:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:09:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:09:27,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:09:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:09:27,623 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:09:27,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147574036] [2021-11-07 08:09:27,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147574036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:27,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:27,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 08:09:27,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904164902] [2021-11-07 08:09:27,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:09:27,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:09:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:09:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:09:27,632 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:28,192 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-07 08:09:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:09:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 08:09:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:28,196 INFO L225 Difference]: With dead ends: 34 [2021-11-07 08:09:28,196 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 08:09:28,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:09:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 08:09:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-11-07 08:09:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-07 08:09:28,203 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-07 08:09:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:28,204 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-07 08:09:28,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-07 08:09:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:09:28,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:28,211 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:28,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:28,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:09:28,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:28,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1277885066, now seen corresponding path program 1 times [2021-11-07 08:09:28,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:09:28,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014694671] [2021-11-07 08:09:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:28,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:09:28,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:09:28,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:09:28,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 08:09:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:28,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:09:28,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:09:29,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:09:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:09:30,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:09:30,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014694671] [2021-11-07 08:09:30,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014694671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:09:30,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:30,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-07 08:09:30,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533979586] [2021-11-07 08:09:30,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:09:30,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:09:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:09:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:09:30,065 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:31,984 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-07 08:09:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:09:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 08:09:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:31,986 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:09:31,987 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 08:09:31,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:09:31,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 08:09:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2021-11-07 08:09:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-07 08:09:31,996 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2021-11-07 08:09:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:31,996 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-07 08:09:31,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-07 08:09:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:09:31,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:31,998 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:32,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:32,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:09:32,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash 764083406, now seen corresponding path program 2 times [2021-11-07 08:09:32,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:09:32,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913299966] [2021-11-07 08:09:32,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:32,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:09:32,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:09:32,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:09:32,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 08:09:32,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:09:32,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:32,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:09:32,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:33,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:09:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:34,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:09:34,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913299966] [2021-11-07 08:09:34,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913299966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:09:34,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:34,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-11-07 08:09:34,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723806708] [2021-11-07 08:09:34,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:09:34,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:09:34,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:09:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:09:34,087 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:36,557 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-07 08:09:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:09:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 08:09:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:36,568 INFO L225 Difference]: With dead ends: 61 [2021-11-07 08:09:36,568 INFO L226 Difference]: Without dead ends: 55 [2021-11-07 08:09:36,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:09:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-07 08:09:36,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-11-07 08:09:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-07 08:09:36,589 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2021-11-07 08:09:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:36,590 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-07 08:09:36,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-07 08:09:36,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:09:36,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:36,594 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:36,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:36,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:09:36,802 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:36,802 INFO L85 PathProgramCache]: Analyzing trace with hash -102020720, now seen corresponding path program 3 times [2021-11-07 08:09:36,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:09:36,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872600415] [2021-11-07 08:09:36,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:09:36,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:09:36,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:09:36,804 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:09:36,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 08:09:37,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:09:37,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:09:37,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:09:38,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:09:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:09:39,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:09:39,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872600415] [2021-11-07 08:09:39,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872600415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:09:39,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:39,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 08:09:39,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652653188] [2021-11-07 08:09:39,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:09:39,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:09:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:09:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:09:39,220 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:40,930 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-11-07 08:09:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:09:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 08:09:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:40,933 INFO L225 Difference]: With dead ends: 50 [2021-11-07 08:09:40,933 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 08:09:40,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:09:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 08:09:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-11-07 08:09:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-07 08:09:40,948 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 24 [2021-11-07 08:09:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:40,948 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-07 08:09:40,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-07 08:09:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:09:40,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:40,950 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:40,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:41,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:09:41,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:41,169 INFO L85 PathProgramCache]: Analyzing trace with hash 795569618, now seen corresponding path program 4 times [2021-11-07 08:09:41,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:09:41,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191294458] [2021-11-07 08:09:41,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:09:41,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:09:41,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:09:41,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:09:41,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348d37ac-2bd8-4a47-b61a-fe074e5398d1/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 08:09:41,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:09:41,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 08:09:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:41,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-07 08:09:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:41,982 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 49 treesize of output 29 [2021-11-07 08:09:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:42,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 70 [2021-11-07 08:09:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:43,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,589 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-07 08:09:43,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 71 [2021-11-07 08:09:44,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:46,374 INFO L354 Elim1Store]: treesize reduction 4890, result has 4.6 percent of original size [2021-11-07 08:09:46,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 89 case distinctions, treesize of input 653 treesize of output 473 [2021-11-07 08:09:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:46,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 149 [2021-11-07 08:09:46,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:46,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:46,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 136 [2021-11-07 08:09:47,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:47,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:47,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:47,136 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-07 08:09:47,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 121 [2021-11-07 08:09:49,865 INFO L354 Elim1Store]: treesize reduction 271, result has 2.9 percent of original size [2021-11-07 08:09:49,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 59 [2021-11-07 08:09:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:50,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:10,642 WARN L207 SmtUtils]: Spent 12.48 s on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-11-07 08:11:35,892 WARN L207 SmtUtils]: Spent 8.18 s on a formula simplification that was a NOOP. DAG size: 99