./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX --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 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:42:04,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:42:04,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:42:04,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:42:04,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:42:04,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:42:04,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:42:04,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:42:04,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:42:04,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:42:04,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:42:04,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:42:04,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:42:04,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:42:04,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:42:04,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:42:04,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:42:04,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:42:04,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:42:04,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:42:04,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:42:04,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:42:04,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:42:04,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:42:04,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:42:04,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:42:04,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:42:04,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:42:04,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:42:04,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:42:04,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:42:04,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:42:04,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:42:04,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:42:04,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:42:04,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:42:04,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:42:04,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:42:04,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:42:04,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:42:04,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:42:04,793 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:42:04,845 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:42:04,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:42:04,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:42:04,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:42:04,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:42:04,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:42:04,856 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:42:04,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:42:04,857 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:42:04,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:42:04,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:42:04,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:42:04,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:42:04,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:42:04,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:42:04,860 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:42:04,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:42:04,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:42:04,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:42:04,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:42:04,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:42:04,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:42:04,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:42:04,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:42:04,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:42:04,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:42:04,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:42:04,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:42:04,864 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:42:04,866 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:42:04,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:42:04,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:42:04,867 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_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 [2021-11-09 10:42:05,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:42:05,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:42:05,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:42:05,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:42:05,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:42:05,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loop-lit/gr2006.i [2021-11-09 10:42:05,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/data/38251d3f2/1877b008e30a459a8ae432708500d325/FLAG2af3c1b64 [2021-11-09 10:42:05,985 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:42:05,986 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/sv-benchmarks/c/loop-lit/gr2006.i [2021-11-09 10:42:06,000 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/data/38251d3f2/1877b008e30a459a8ae432708500d325/FLAG2af3c1b64 [2021-11-09 10:42:06,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/data/38251d3f2/1877b008e30a459a8ae432708500d325 [2021-11-09 10:42:06,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:42:06,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:42:06,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:42:06,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:42:06,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:42:06,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bcf298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06, skipping insertion in model container [2021-11-09 10:42:06,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:42:06,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:42:06,620 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_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-11-09 10:42:06,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:42:06,644 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:42:06,665 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_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-11-09 10:42:06,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:42:06,698 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:42:06,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06 WrapperNode [2021-11-09 10:42:06,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:42:06,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:42:06,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:42:06,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:42:06,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:42:06,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:42:06,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:42:06,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:42:06,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:42:06,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:42:06,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:42:06,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:42:06,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (1/1) ... [2021-11-09 10:42:06,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:42:06,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:06,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:42:06,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:42:06,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:42:06,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:42:06,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:42:06,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:42:07,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:42:07,148 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-09 10:42:07,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:42:07 BoogieIcfgContainer [2021-11-09 10:42:07,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:42:07,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:42:07,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:42:07,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:42:07,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:42:06" (1/3) ... [2021-11-09 10:42:07,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b312a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:42:07, skipping insertion in model container [2021-11-09 10:42:07,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:42:06" (2/3) ... [2021-11-09 10:42:07,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b312a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:42:07, skipping insertion in model container [2021-11-09 10:42:07,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:42:07" (3/3) ... [2021-11-09 10:42:07,177 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-11-09 10:42:07,184 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:42:07,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:42:07,247 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:42:07,257 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 [2021-11-09 10:42:07,257 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:42:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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) [2021-11-09 10:42:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 10:42:07,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:07,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 10:42:07,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash 890091623, now seen corresponding path program 1 times [2021-11-09 10:42:07,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:07,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094504154] [2021-11-09 10:42:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:07,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:07,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:07,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094504154] [2021-11-09 10:42:07,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094504154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:07,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:07,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:42:07,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839885775] [2021-11-09 10:42:07,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:42:07,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:07,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:42:07,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:42:07,717 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-09 10:42:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:07,741 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-11-09 10:42:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:42:07,743 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-09 10:42:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:07,754 INFO L225 Difference]: With dead ends: 21 [2021-11-09 10:42:07,755 INFO L226 Difference]: Without dead ends: 9 [2021-11-09 10:42:07,760 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 [2021-11-09 10:42:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-09 10:42:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-09 10:42:07,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-11-09 10:42:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-09 10:42:07,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-09 10:42:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:07,804 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-09 10:42:07,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-09 10:42:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-09 10:42:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 10:42:07,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:07,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:07,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:42:07,808 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash 297871632, now seen corresponding path program 1 times [2021-11-09 10:42:07,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:07,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958842843] [2021-11-09 10:42:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:07,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:07,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:07,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958842843] [2021-11-09 10:42:07,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958842843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:07,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:07,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:42:07,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234739085] [2021-11-09 10:42:07,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:42:07,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:07,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:42:07,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:42:07,967 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-09 10:42:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:07,989 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-11-09 10:42:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:42:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-11-09 10:42:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:07,991 INFO L225 Difference]: With dead ends: 23 [2021-11-09 10:42:07,991 INFO L226 Difference]: Without dead ends: 16 [2021-11-09 10:42:07,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:42:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-09 10:42:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-11-09 10:42:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-11-09 10:42:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-09 10:42:07,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-11-09 10:42:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:07,999 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-09 10:42:08,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-09 10:42:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-09 10:42:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 10:42:08,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:08,002 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:08,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:42:08,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:08,004 INFO L85 PathProgramCache]: Analyzing trace with hash 296024590, now seen corresponding path program 1 times [2021-11-09 10:42:08,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:08,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647692339] [2021-11-09 10:42:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:08,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:08,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:08,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647692339] [2021-11-09 10:42:08,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647692339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:42:08,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:42:08,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:42:08,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144679947] [2021-11-09 10:42:08,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:42:08,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:42:08,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:42:08,090 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-09 10:42:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:08,138 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-09 10:42:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:42:08,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-11-09 10:42:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:08,140 INFO L225 Difference]: With dead ends: 18 [2021-11-09 10:42:08,146 INFO L226 Difference]: Without dead ends: 14 [2021-11-09 10:42:08,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:42:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-09 10:42:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-09 10:42:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-11-09 10:42:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-09 10:42:08,151 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-11-09 10:42:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:08,174 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-09 10:42:08,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-09 10:42:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-09 10:42:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:42:08,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:08,175 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:08,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:42:08,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:08,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1661002755, now seen corresponding path program 1 times [2021-11-09 10:42:08,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:08,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592671268] [2021-11-09 10:42:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:08,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:08,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:08,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592671268] [2021-11-09 10:42:08,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592671268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:08,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75469101] [2021-11-09 10:42:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:08,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:08,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:08,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:08,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:42:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:42:08,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:08,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75469101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:08,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:08,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 10:42:08,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560488462] [2021-11-09 10:42:08,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:42:08,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:42:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:08,487 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-09 10:42:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:08,513 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-11-09 10:42:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:42:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 [2021-11-09 10:42:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:08,515 INFO L225 Difference]: With dead ends: 25 [2021-11-09 10:42:08,515 INFO L226 Difference]: Without dead ends: 18 [2021-11-09 10:42:08,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:42:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-09 10:42:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-09 10:42:08,519 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) [2021-11-09 10:42:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-09 10:42:08,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-09 10:42:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:08,521 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-09 10:42:08,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-09 10:42:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-09 10:42:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 10:42:08,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:08,523 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:08,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:08,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:08,743 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:08,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:08,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1527752176, now seen corresponding path program 2 times [2021-11-09 10:42:08,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:08,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418959711] [2021-11-09 10:42:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:08,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:08,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:08,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418959711] [2021-11-09 10:42:08,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418959711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:08,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427871875] [2021-11-09 10:42:08,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:08,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:08,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:08,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:08,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:42:08,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:08,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:08,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:42:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:42:09,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427871875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:09,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:09,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 10:42:09,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531094484] [2021-11-09 10:42:09,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:42:09,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:42:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:09,108 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-11-09 10:42:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:09,230 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-09 10:42:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:09,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 14 [2021-11-09 10:42:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:09,232 INFO L225 Difference]: With dead ends: 35 [2021-11-09 10:42:09,232 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 10:42:09,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:42:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 10:42:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-09 10:42:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-11-09 10:42:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-09 10:42:09,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-09 10:42:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:09,240 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-09 10:42:09,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-11-09 10:42:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-09 10:42:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:42:09,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:09,242 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:09,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:09,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:09,467 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:09,468 INFO L85 PathProgramCache]: Analyzing trace with hash -54480515, now seen corresponding path program 3 times [2021-11-09 10:42:09,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:09,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665028870] [2021-11-09 10:42:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:09,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 10:42:09,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:09,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665028870] [2021-11-09 10:42:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665028870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:09,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268861351] [2021-11-09 10:42:09,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:09,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:09,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:09,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:09,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:42:09,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:42:09,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:42:09,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:42:09,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268861351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:09,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:09,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 10:42:09,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302914804] [2021-11-09 10:42:09,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:42:09,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:42:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:42:09,836 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2021-11-09 10:42:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:09,957 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-11-09 10:42:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:42:09,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 23 [2021-11-09 10:42:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:09,959 INFO L225 Difference]: With dead ends: 52 [2021-11-09 10:42:09,959 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 10:42:09,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 10:42:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-11-09 10:42:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2021-11-09 10:42:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-09 10:42:09,967 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2021-11-09 10:42:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:09,968 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-09 10:42:09,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2021-11-09 10:42:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-09 10:42:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 10:42:09,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:09,970 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:10,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:10,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 10:42:10,195 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:10,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:10,196 INFO L85 PathProgramCache]: Analyzing trace with hash -125277221, now seen corresponding path program 4 times [2021-11-09 10:42:10,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:10,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914574854] [2021-11-09 10:42:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:10,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 10:42:10,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:10,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914574854] [2021-11-09 10:42:10,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914574854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:10,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229700220] [2021-11-09 10:42:10,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:10,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:10,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:10,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:10,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:42:10,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:10,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:10,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:42:10,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 10:42:10,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229700220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:10,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:10,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-09 10:42:10,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193348671] [2021-11-09 10:42:10,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:42:10,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:10,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:42:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:10,567 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2021-11-09 10:42:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:10,602 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-11-09 10:42:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:42:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) Word has length 29 [2021-11-09 10:42:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:10,604 INFO L225 Difference]: With dead ends: 51 [2021-11-09 10:42:10,604 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 10:42:10,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:42:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 10:42:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-09 10:42:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-11-09 10:42:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-09 10:42:10,611 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 29 [2021-11-09 10:42:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:10,612 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-09 10:42:10,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2021-11-09 10:42:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-09 10:42:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:42:10,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:10,614 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:10,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 10:42:10,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 10:42:10,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1180467442, now seen corresponding path program 5 times [2021-11-09 10:42:10,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:10,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554296292] [2021-11-09 10:42:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:10,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 10:42:10,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:10,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554296292] [2021-11-09 10:42:10,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554296292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:10,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218320747] [2021-11-09 10:42:10,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:10,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:10,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:10,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:10,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:42:11,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-09 10:42:11,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:42:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 10:42:11,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218320747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:11,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:11,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 10:42:11,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181963929] [2021-11-09 10:42:11,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:42:11,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:11,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:42:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:42:11,235 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-11-09 10:42:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:11,282 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-09 10:42:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:42:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 32 [2021-11-09 10:42:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:11,284 INFO L225 Difference]: With dead ends: 54 [2021-11-09 10:42:11,284 INFO L226 Difference]: Without dead ends: 37 [2021-11-09 10:42:11,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:42:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-09 10:42:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-11-09 10:42:11,290 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) [2021-11-09 10:42:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-09 10:42:11,292 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2021-11-09 10:42:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:11,292 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-09 10:42:11,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-11-09 10:42:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-09 10:42:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:42:11,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:11,294 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:11,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:11,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:11,499 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:11,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1486701829, now seen corresponding path program 6 times [2021-11-09 10:42:11,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:11,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114895570] [2021-11-09 10:42:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:11,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 10:42:11,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:11,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114895570] [2021-11-09 10:42:11,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114895570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:11,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80528646] [2021-11-09 10:42:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:11,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:11,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:11,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:42:11,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 10:42:11,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:42:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 10:42:11,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80528646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:11,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:11,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-09 10:42:11,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257898010] [2021-11-09 10:42:11,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:42:11,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:11,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:42:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:42:11,952 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2021-11-09 10:42:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:12,169 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-11-09 10:42:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:42:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 35 [2021-11-09 10:42:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:12,176 INFO L225 Difference]: With dead ends: 70 [2021-11-09 10:42:12,176 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 10:42:12,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:42:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 10:42:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2021-11-09 10:42:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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) [2021-11-09 10:42:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-09 10:42:12,202 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 35 [2021-11-09 10:42:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:12,204 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-09 10:42:12,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2021-11-09 10:42:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-09 10:42:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 10:42:12,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:12,210 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 7, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:12,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:12,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:12,439 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1793004003, now seen corresponding path program 7 times [2021-11-09 10:42:12,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:12,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299014220] [2021-11-09 10:42:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:12,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:12,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:12,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299014220] [2021-11-09 10:42:12,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299014220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:12,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471734942] [2021-11-09 10:42:12,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:12,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:12,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:12,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:12,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:42:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:42:12,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:12,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471734942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:12,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:12,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 10:42:12,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890455563] [2021-11-09 10:42:12,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:42:12,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:12,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:42:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:12,831 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-11-09 10:42:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:12,890 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-11-09 10:42:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:42:12,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 41 [2021-11-09 10:42:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:12,901 INFO L225 Difference]: With dead ends: 66 [2021-11-09 10:42:12,903 INFO L226 Difference]: Without dead ends: 46 [2021-11-09 10:42:12,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:42:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-09 10:42:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-09 10:42:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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) [2021-11-09 10:42:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-11-09 10:42:12,911 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 41 [2021-11-09 10:42:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:12,912 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-11-09 10:42:12,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-11-09 10:42:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-11-09 10:42:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:42:12,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:12,913 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:12,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:13,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:42:13,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1018049328, now seen corresponding path program 8 times [2021-11-09 10:42:13,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:13,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936958320] [2021-11-09 10:42:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:13,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:13,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:13,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936958320] [2021-11-09 10:42:13,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936958320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:13,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398599127] [2021-11-09 10:42:13,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:13,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:13,267 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:13,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:42:13,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:13,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:42:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:13,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398599127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:13,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:13,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 10:42:13,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938266200] [2021-11-09 10:42:13,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:42:13,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:42:13,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:13,598 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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) [2021-11-09 10:42:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:13,643 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-11-09 10:42:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:42:13,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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 44 [2021-11-09 10:42:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:13,647 INFO L225 Difference]: With dead ends: 69 [2021-11-09 10:42:13,647 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 10:42:13,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:42:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 10:42:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-11-09 10:42:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 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) [2021-11-09 10:42:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-09 10:42:13,658 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2021-11-09 10:42:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:13,659 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-09 10:42:13,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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) [2021-11-09 10:42:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-09 10:42:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 10:42:13,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:13,665 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:13,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:13,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:13,866 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash 207457597, now seen corresponding path program 9 times [2021-11-09 10:42:13,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:13,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128156696] [2021-11-09 10:42:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:13,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 125 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:14,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:14,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128156696] [2021-11-09 10:42:14,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128156696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:14,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384272667] [2021-11-09 10:42:14,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:14,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:14,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:14,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:14,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:42:14,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-09 10:42:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 10:42:14,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 13 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:42:14,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384272667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:14,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:14,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 17 [2021-11-09 10:42:14,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3171651] [2021-11-09 10:42:14,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:42:14,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:42:14,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:14,497 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2021-11-09 10:42:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:14,563 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-11-09 10:42:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:42:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 47 [2021-11-09 10:42:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:14,565 INFO L225 Difference]: With dead ends: 84 [2021-11-09 10:42:14,565 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 10:42:14,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:42:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 10:42:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-09 10:42:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 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) [2021-11-09 10:42:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-11-09 10:42:14,575 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 47 [2021-11-09 10:42:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:14,575 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-11-09 10:42:14,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2021-11-09 10:42:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-11-09 10:42:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:42:14,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:14,578 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 14, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:14,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:14,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:42:14,801 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:14,802 INFO L85 PathProgramCache]: Analyzing trace with hash 32308080, now seen corresponding path program 10 times [2021-11-09 10:42:14,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:14,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889286578] [2021-11-09 10:42:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:14,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:15,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:15,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889286578] [2021-11-09 10:42:15,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889286578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:15,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976879174] [2021-11-09 10:42:15,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:15,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:15,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:15,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:42:15,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:15,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:42:15,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976879174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:15,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:15,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 10:42:15,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780887876] [2021-11-09 10:42:15,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:42:15,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:15,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:42:15,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:42:15,434 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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) [2021-11-09 10:42:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:15,505 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-11-09 10:42:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:42:15,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 62 [2021-11-09 10:42:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:15,508 INFO L225 Difference]: With dead ends: 87 [2021-11-09 10:42:15,508 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 10:42:15,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:42:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 10:42:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-11-09 10:42:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 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) [2021-11-09 10:42:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-11-09 10:42:15,532 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 62 [2021-11-09 10:42:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:15,532 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-11-09 10:42:15,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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) [2021-11-09 10:42:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-11-09 10:42:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:42:15,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:15,541 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 15, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:15,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:15,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:15,767 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1726719331, now seen corresponding path program 11 times [2021-11-09 10:42:15,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:15,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082964342] [2021-11-09 10:42:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:15,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 203 proven. 345 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:16,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:16,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082964342] [2021-11-09 10:42:16,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082964342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:16,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433664298] [2021-11-09 10:42:16,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:16,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:16,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:16,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:16,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:42:16,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-09 10:42:16,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:16,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:42:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 203 proven. 345 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:16,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433664298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:16,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:16,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 10:42:16,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935329206] [2021-11-09 10:42:16,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:42:16,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:42:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:42:16,604 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2021-11-09 10:42:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:16,664 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2021-11-09 10:42:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:42:16,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 65 [2021-11-09 10:42:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:16,666 INFO L225 Difference]: With dead ends: 90 [2021-11-09 10:42:16,666 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 10:42:16,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:42:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 10:42:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-09 10:42:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 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) [2021-11-09 10:42:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-11-09 10:42:16,675 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 65 [2021-11-09 10:42:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:16,676 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-11-09 10:42:16,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2021-11-09 10:42:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-11-09 10:42:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:42:16,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:16,678 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 16, 5, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:16,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:16,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:16,903 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:16,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:16,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2016341936, now seen corresponding path program 12 times [2021-11-09 10:42:16,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:16,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233253091] [2021-11-09 10:42:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:16,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 216 proven. 392 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:42:17,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:17,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233253091] [2021-11-09 10:42:17,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233253091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:17,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101507549] [2021-11-09 10:42:17,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:17,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:17,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:17,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:17,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:42:17,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-09 10:42:17,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:17,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:42:17,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 560 proven. 57 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-09 10:42:18,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101507549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:18,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:18,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-11-09 10:42:18,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157724694] [2021-11-09 10:42:18,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 10:42:18,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 10:42:18,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:42:18,073 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 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) [2021-11-09 10:42:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:18,766 INFO L93 Difference]: Finished difference Result 285 states and 368 transitions. [2021-11-09 10:42:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-09 10:42:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 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 68 [2021-11-09 10:42:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:18,769 INFO L225 Difference]: With dead ends: 285 [2021-11-09 10:42:18,770 INFO L226 Difference]: Without dead ends: 265 [2021-11-09 10:42:18,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1049, Invalid=3643, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 10:42:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-09 10:42:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 108. [2021-11-09 10:42:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 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) [2021-11-09 10:42:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2021-11-09 10:42:18,788 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 68 [2021-11-09 10:42:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:18,788 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2021-11-09 10:42:18,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 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) [2021-11-09 10:42:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2021-11-09 10:42:18,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 10:42:18,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:18,791 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 17, 17, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:18,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:19,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 10:42:19,007 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1230960643, now seen corresponding path program 13 times [2021-11-09 10:42:19,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:19,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550072052] [2021-11-09 10:42:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:19,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 865 proven. 442 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:42:19,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:19,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550072052] [2021-11-09 10:42:19,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550072052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:19,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586733694] [2021-11-09 10:42:19,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:19,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:19,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:19,308 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:19,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:42:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:42:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 865 proven. 442 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:42:20,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586733694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:20,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:20,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 10:42:20,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386221990] [2021-11-09 10:42:20,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:42:20,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:20,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:42:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:42:20,028 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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) [2021-11-09 10:42:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:20,115 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2021-11-09 10:42:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:42:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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 107 [2021-11-09 10:42:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:20,117 INFO L225 Difference]: With dead ends: 168 [2021-11-09 10:42:20,117 INFO L226 Difference]: Without dead ends: 112 [2021-11-09 10:42:20,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:42:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-09 10:42:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-11-09 10:42:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 110 states have internal predecessors, (128), 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) [2021-11-09 10:42:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2021-11-09 10:42:20,143 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 107 [2021-11-09 10:42:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:20,145 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2021-11-09 10:42:20,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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) [2021-11-09 10:42:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2021-11-09 10:42:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-09 10:42:20,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:20,147 INFO L513 BasicCegarLoop]: trace histogram [35, 34, 18, 17, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:20,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:20,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 10:42:20,364 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash 174845424, now seen corresponding path program 14 times [2021-11-09 10:42:20,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:20,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478193643] [2021-11-09 10:42:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:20,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 914 proven. 495 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:42:20,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:20,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478193643] [2021-11-09 10:42:20,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478193643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:20,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712037900] [2021-11-09 10:42:20,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:20,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:20,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:20,672 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:20,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:42:21,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:21,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:21,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:42:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 914 proven. 495 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:42:21,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712037900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:21,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:21,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 10:42:21,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513647464] [2021-11-09 10:42:21,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:42:21,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:42:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:42:21,417 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 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) [2021-11-09 10:42:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:21,497 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2021-11-09 10:42:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:42:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 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 110 [2021-11-09 10:42:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:21,500 INFO L225 Difference]: With dead ends: 171 [2021-11-09 10:42:21,500 INFO L226 Difference]: Without dead ends: 115 [2021-11-09 10:42:21,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:42:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-09 10:42:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-11-09 10:42:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 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) [2021-11-09 10:42:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-11-09 10:42:21,511 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 110 [2021-11-09 10:42:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:21,512 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-11-09 10:42:21,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 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) [2021-11-09 10:42:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-11-09 10:42:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-09 10:42:21,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:21,514 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 19, 17, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:21,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:21,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:42:21,721 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash 317284125, now seen corresponding path program 15 times [2021-11-09 10:42:21,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:21,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215660464] [2021-11-09 10:42:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:21,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 963 proven. 551 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:42:22,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:22,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215660464] [2021-11-09 10:42:22,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215660464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:22,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356487042] [2021-11-09 10:42:22,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:22,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:22,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:22,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:22,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:42:22,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-11-09 10:42:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:22,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:42:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1040 proven. 801 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-09 10:42:23,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356487042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:23,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:23,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-11-09 10:42:23,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712409659] [2021-11-09 10:42:23,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 10:42:23,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:23,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 10:42:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:42:23,366 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 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) [2021-11-09 10:42:24,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:24,152 INFO L93 Difference]: Finished difference Result 330 states and 419 transitions. [2021-11-09 10:42:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 10:42:24,153 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 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 113 [2021-11-09 10:42:24,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:24,156 INFO L225 Difference]: With dead ends: 330 [2021-11-09 10:42:24,156 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 10:42:24,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1415, Invalid=5065, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 10:42:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 10:42:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 126. [2021-11-09 10:42:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.168) internal successors, (146), 125 states have internal predecessors, (146), 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) [2021-11-09 10:42:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-11-09 10:42:24,175 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 113 [2021-11-09 10:42:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:24,175 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-11-09 10:42:24,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 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) [2021-11-09 10:42:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-11-09 10:42:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-09 10:42:24,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:24,178 INFO L513 BasicCegarLoop]: trace histogram [40, 39, 20, 20, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:24,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:42:24,391 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -934304805, now seen corresponding path program 16 times [2021-11-09 10:42:24,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:24,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577558955] [2021-11-09 10:42:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:24,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1198 proven. 610 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 10:42:24,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:24,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577558955] [2021-11-09 10:42:24,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577558955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:24,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130211179] [2021-11-09 10:42:24,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:24,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:24,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:24,780 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:24,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:42:25,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:25,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:42:25,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1198 proven. 610 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 10:42:25,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130211179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:25,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:25,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 10:42:25,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672439220] [2021-11-09 10:42:25,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:42:25,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:42:25,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:42:25,640 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 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) [2021-11-09 10:42:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:25,718 INFO L93 Difference]: Finished difference Result 195 states and 236 transitions. [2021-11-09 10:42:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:42:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 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 125 [2021-11-09 10:42:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:25,721 INFO L225 Difference]: With dead ends: 195 [2021-11-09 10:42:25,721 INFO L226 Difference]: Without dead ends: 130 [2021-11-09 10:42:25,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:42:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-09 10:42:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-11-09 10:42:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1640625) internal successors, (149), 128 states have internal predecessors, (149), 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) [2021-11-09 10:42:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2021-11-09 10:42:25,733 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 125 [2021-11-09 10:42:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:25,734 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2021-11-09 10:42:25,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 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) [2021-11-09 10:42:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2021-11-09 10:42:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-09 10:42:25,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:25,737 INFO L513 BasicCegarLoop]: trace histogram [41, 40, 21, 20, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:25,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:25,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:25,963 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:25,963 INFO L85 PathProgramCache]: Analyzing trace with hash 533074702, now seen corresponding path program 17 times [2021-11-09 10:42:25,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:25,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229800182] [2021-11-09 10:42:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:25,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1256 proven. 672 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 10:42:26,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:26,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229800182] [2021-11-09 10:42:26,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229800182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:26,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125300663] [2021-11-09 10:42:26,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:26,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:26,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:26,344 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:26,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:42:26,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-11-09 10:42:26,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:42:26,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1256 proven. 672 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 10:42:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125300663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:27,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:27,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 10:42:27,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216525341] [2021-11-09 10:42:27,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:42:27,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:42:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:42:27,293 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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) [2021-11-09 10:42:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:27,373 INFO L93 Difference]: Finished difference Result 198 states and 239 transitions. [2021-11-09 10:42:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:42:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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 128 [2021-11-09 10:42:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:27,375 INFO L225 Difference]: With dead ends: 198 [2021-11-09 10:42:27,376 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 10:42:27,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:42:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 10:42:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-11-09 10:42:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 131 states have internal predecessors, (152), 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) [2021-11-09 10:42:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2021-11-09 10:42:27,390 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 128 [2021-11-09 10:42:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:27,391 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2021-11-09 10:42:27,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 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) [2021-11-09 10:42:27,391 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2021-11-09 10:42:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-09 10:42:27,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:27,394 INFO L513 BasicCegarLoop]: trace histogram [42, 41, 22, 20, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:27,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:27,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:27,611 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1058829051, now seen corresponding path program 18 times [2021-11-09 10:42:27,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:27,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150273029] [2021-11-09 10:42:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:27,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1314 proven. 737 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-09 10:42:28,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:28,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150273029] [2021-11-09 10:42:28,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150273029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:28,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821137074] [2021-11-09 10:42:28,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:28,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:28,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:28,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:28,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:42:28,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2021-11-09 10:42:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:28,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 10:42:28,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1403 proven. 1122 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-09 10:42:29,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821137074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:29,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:29,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-09 10:42:29,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227545611] [2021-11-09 10:42:29,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 10:42:29,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 10:42:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:42:29,649 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 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) [2021-11-09 10:42:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:30,564 INFO L93 Difference]: Finished difference Result 384 states and 488 transitions. [2021-11-09 10:42:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-09 10:42:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 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 131 [2021-11-09 10:42:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:30,568 INFO L225 Difference]: With dead ends: 384 [2021-11-09 10:42:30,568 INFO L226 Difference]: Without dead ends: 319 [2021-11-09 10:42:30,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1835, Invalid=6721, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 10:42:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-09 10:42:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 144. [2021-11-09 10:42:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.167832167832168) internal successors, (167), 143 states have internal predecessors, (167), 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) [2021-11-09 10:42:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2021-11-09 10:42:30,590 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 131 [2021-11-09 10:42:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:30,590 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2021-11-09 10:42:30,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 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) [2021-11-09 10:42:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2021-11-09 10:42:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 10:42:30,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:30,593 INFO L513 BasicCegarLoop]: trace histogram [46, 45, 23, 23, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:30,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:30,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 10:42:30,815 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash 901437565, now seen corresponding path program 19 times [2021-11-09 10:42:30,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:30,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378130345] [2021-11-09 10:42:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:30,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1585 proven. 805 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-09 10:42:31,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:31,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378130345] [2021-11-09 10:42:31,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378130345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:31,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770041941] [2021-11-09 10:42:31,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:31,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:31,283 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:31,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:42:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:42:31,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1585 proven. 805 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-09 10:42:32,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770041941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:32,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-09 10:42:32,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097071563] [2021-11-09 10:42:32,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:42:32,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:42:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:42:32,526 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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) [2021-11-09 10:42:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:32,620 INFO L93 Difference]: Finished difference Result 222 states and 269 transitions. [2021-11-09 10:42:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 10:42:32,621 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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 143 [2021-11-09 10:42:32,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:32,623 INFO L225 Difference]: With dead ends: 222 [2021-11-09 10:42:32,623 INFO L226 Difference]: Without dead ends: 148 [2021-11-09 10:42:32,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:42:32,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-09 10:42:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-11-09 10:42:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 146 states have internal predecessors, (170), 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) [2021-11-09 10:42:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2021-11-09 10:42:32,639 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 143 [2021-11-09 10:42:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:32,639 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2021-11-09 10:42:32,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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) [2021-11-09 10:42:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2021-11-09 10:42:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-09 10:42:32,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:32,642 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 24, 23, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:32,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:32,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:32,859 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1257963280, now seen corresponding path program 20 times [2021-11-09 10:42:32,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:32,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779434304] [2021-11-09 10:42:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:32,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1652 proven. 876 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-09 10:42:33,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:33,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779434304] [2021-11-09 10:42:33,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779434304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:33,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450466144] [2021-11-09 10:42:33,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:33,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:33,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:33,340 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:33,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:42:34,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:42:34,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1652 proven. 876 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-09 10:42:34,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450466144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:34,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:34,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-09 10:42:34,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352339692] [2021-11-09 10:42:34,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:42:34,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:42:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:42:34,481 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 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) [2021-11-09 10:42:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:34,578 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2021-11-09 10:42:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 10:42:34,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 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 146 [2021-11-09 10:42:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:34,581 INFO L225 Difference]: With dead ends: 225 [2021-11-09 10:42:34,581 INFO L226 Difference]: Without dead ends: 151 [2021-11-09 10:42:34,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:42:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-09 10:42:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-11-09 10:42:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 149 states have internal predecessors, (173), 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) [2021-11-09 10:42:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2021-11-09 10:42:34,598 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 146 [2021-11-09 10:42:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:34,599 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2021-11-09 10:42:34,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 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) [2021-11-09 10:42:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2021-11-09 10:42:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-09 10:42:34,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:34,601 INFO L513 BasicCegarLoop]: trace histogram [48, 47, 25, 23, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:34,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:34,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:34,817 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1948377187, now seen corresponding path program 21 times [2021-11-09 10:42:34,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:34,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128592661] [2021-11-09 10:42:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:34,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1719 proven. 950 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-09 10:42:35,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:35,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128592661] [2021-11-09 10:42:35,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128592661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:35,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069714797] [2021-11-09 10:42:35,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:35,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:35,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:35,332 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:35,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:42:36,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-11-09 10:42:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:42:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1820 proven. 1497 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-09 10:42:37,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069714797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:37,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:37,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-09 10:42:37,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636278549] [2021-11-09 10:42:37,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 10:42:37,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 10:42:37,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 10:42:37,423 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 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) [2021-11-09 10:42:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:38,456 INFO L93 Difference]: Finished difference Result 438 states and 557 transitions. [2021-11-09 10:42:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-09 10:42:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 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 149 [2021-11-09 10:42:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:38,461 INFO L225 Difference]: With dead ends: 438 [2021-11-09 10:42:38,461 INFO L226 Difference]: Without dead ends: 364 [2021-11-09 10:42:38,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2309, Invalid=8611, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 10:42:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-09 10:42:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 162. [2021-11-09 10:42:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 161 states have internal predecessors, (188), 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) [2021-11-09 10:42:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-11-09 10:42:38,487 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 149 [2021-11-09 10:42:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:38,487 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-11-09 10:42:38,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 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) [2021-11-09 10:42:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-11-09 10:42:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-09 10:42:38,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:38,490 INFO L513 BasicCegarLoop]: trace histogram [52, 51, 26, 26, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:38,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-09 10:42:38,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 10:42:38,707 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1177477339, now seen corresponding path program 22 times [2021-11-09 10:42:38,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:38,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317593812] [2021-11-09 10:42:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:38,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2026 proven. 1027 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:39,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:39,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317593812] [2021-11-09 10:42:39,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317593812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:39,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15152428] [2021-11-09 10:42:39,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:39,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:39,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:39,170 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:39,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:42:39,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:39,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:39,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:42:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2026 proven. 1027 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:40,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15152428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:40,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:40,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-09 10:42:40,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815809243] [2021-11-09 10:42:40,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 10:42:40,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 10:42:40,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:42:40,296 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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) [2021-11-09 10:42:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:40,413 INFO L93 Difference]: Finished difference Result 249 states and 302 transitions. [2021-11-09 10:42:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:42:40,414 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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 161 [2021-11-09 10:42:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:40,416 INFO L225 Difference]: With dead ends: 249 [2021-11-09 10:42:40,416 INFO L226 Difference]: Without dead ends: 166 [2021-11-09 10:42:40,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:42:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-09 10:42:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-11-09 10:42:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1646341463414633) internal successors, (191), 164 states have internal predecessors, (191), 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) [2021-11-09 10:42:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2021-11-09 10:42:40,436 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 161 [2021-11-09 10:42:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:40,436 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2021-11-09 10:42:40,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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) [2021-11-09 10:42:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2021-11-09 10:42:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-09 10:42:40,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:40,439 INFO L513 BasicCegarLoop]: trace histogram [53, 52, 27, 26, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:40,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:40,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 10:42:40,667 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1237906062, now seen corresponding path program 23 times [2021-11-09 10:42:40,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:40,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205465033] [2021-11-09 10:42:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:40,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2102 proven. 1107 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:41,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:41,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205465033] [2021-11-09 10:42:41,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205465033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:41,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943641] [2021-11-09 10:42:41,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:41,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:41,153 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:41,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:42:41,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2021-11-09 10:42:41,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:41,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:42:41,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2102 proven. 1107 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:42,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:42,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:42,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-09 10:42:42,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127764933] [2021-11-09 10:42:42,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:42:42,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:42:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:42:42,400 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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) [2021-11-09 10:42:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:42,552 INFO L93 Difference]: Finished difference Result 252 states and 305 transitions. [2021-11-09 10:42:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:42:42,553 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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 164 [2021-11-09 10:42:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:42,555 INFO L225 Difference]: With dead ends: 252 [2021-11-09 10:42:42,555 INFO L226 Difference]: Without dead ends: 169 [2021-11-09 10:42:42,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:42:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-09 10:42:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-11-09 10:42:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1616766467065869) internal successors, (194), 167 states have internal predecessors, (194), 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) [2021-11-09 10:42:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2021-11-09 10:42:42,574 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 164 [2021-11-09 10:42:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:42,575 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2021-11-09 10:42:42,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 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) [2021-11-09 10:42:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2021-11-09 10:42:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-09 10:42:42,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:42,577 INFO L513 BasicCegarLoop]: trace histogram [54, 53, 28, 26, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:42,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:42,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:42:42,803 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1878695931, now seen corresponding path program 24 times [2021-11-09 10:42:42,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:42,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893962659] [2021-11-09 10:42:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:42,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2178 proven. 1190 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:43,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:43,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893962659] [2021-11-09 10:42:43,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893962659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:43,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868874197] [2021-11-09 10:42:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:42:43,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:43,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:43,403 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:43,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:42:44,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 54 check-sat command(s) [2021-11-09 10:42:44,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:44,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:42:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2178 proven. 1190 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:44,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868874197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:44,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:44,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-09 10:42:44,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525016943] [2021-11-09 10:42:44,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 10:42:44,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:44,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 10:42:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:42:44,808 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 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) [2021-11-09 10:42:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:44,909 INFO L93 Difference]: Finished difference Result 255 states and 308 transitions. [2021-11-09 10:42:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:42:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 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 167 [2021-11-09 10:42:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:44,911 INFO L225 Difference]: With dead ends: 255 [2021-11-09 10:42:44,911 INFO L226 Difference]: Without dead ends: 172 [2021-11-09 10:42:44,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:42:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-09 10:42:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-11-09 10:42:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 170 states have internal predecessors, (197), 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) [2021-11-09 10:42:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 197 transitions. [2021-11-09 10:42:44,940 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 197 transitions. Word has length 167 [2021-11-09 10:42:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:44,941 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 197 transitions. [2021-11-09 10:42:44,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 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) [2021-11-09 10:42:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 197 transitions. [2021-11-09 10:42:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-09 10:42:44,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:44,943 INFO L513 BasicCegarLoop]: trace histogram [55, 54, 29, 26, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:44,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:45,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:42:45,167 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:45,168 INFO L85 PathProgramCache]: Analyzing trace with hash 520052590, now seen corresponding path program 25 times [2021-11-09 10:42:45,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:45,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803700519] [2021-11-09 10:42:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:45,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2254 proven. 1276 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:45,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:45,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803700519] [2021-11-09 10:42:45,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803700519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:45,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882211277] [2021-11-09 10:42:45,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:42:45,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:45,733 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:45,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:42:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:42:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2254 proven. 1276 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:47,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882211277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:47,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:47,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-09 10:42:47,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586021638] [2021-11-09 10:42:47,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:42:47,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:47,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:42:47,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:42:47,003 INFO L87 Difference]: Start difference. First operand 171 states and 197 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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) [2021-11-09 10:42:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:47,139 INFO L93 Difference]: Finished difference Result 258 states and 311 transitions. [2021-11-09 10:42:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:42:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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 170 [2021-11-09 10:42:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:47,142 INFO L225 Difference]: With dead ends: 258 [2021-11-09 10:42:47,142 INFO L226 Difference]: Without dead ends: 175 [2021-11-09 10:42:47,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:42:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-09 10:42:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-11-09 10:42:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1560693641618498) internal successors, (200), 173 states have internal predecessors, (200), 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) [2021-11-09 10:42:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2021-11-09 10:42:47,161 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 170 [2021-11-09 10:42:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:47,162 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2021-11-09 10:42:47,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 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) [2021-11-09 10:42:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2021-11-09 10:42:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-09 10:42:47,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:47,163 INFO L513 BasicCegarLoop]: trace histogram [56, 55, 30, 26, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:47,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:47,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:42:47,365 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 948078363, now seen corresponding path program 26 times [2021-11-09 10:42:47,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:47,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929125347] [2021-11-09 10:42:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:47,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2330 proven. 1365 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:48,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:48,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929125347] [2021-11-09 10:42:48,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929125347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:48,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575458263] [2021-11-09 10:42:48,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:42:48,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:48,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:48,035 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:48,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:42:48,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:42:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 10:42:48,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2330 proven. 1365 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:49,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575458263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:49,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:49,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-09 10:42:49,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493560410] [2021-11-09 10:42:49,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:42:49,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:42:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:42:49,404 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 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) [2021-11-09 10:42:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:49,564 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2021-11-09 10:42:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:42:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 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 173 [2021-11-09 10:42:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:49,567 INFO L225 Difference]: With dead ends: 261 [2021-11-09 10:42:49,567 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 10:42:49,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:42:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 10:42:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-11-09 10:42:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1534090909090908) internal successors, (203), 176 states have internal predecessors, (203), 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) [2021-11-09 10:42:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2021-11-09 10:42:49,589 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 173 [2021-11-09 10:42:49,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:49,590 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2021-11-09 10:42:49,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 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) [2021-11-09 10:42:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2021-11-09 10:42:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-09 10:42:49,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:49,592 INFO L513 BasicCegarLoop]: trace histogram [57, 56, 31, 26, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:49,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:49,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 10:42:49,817 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash 505979982, now seen corresponding path program 27 times [2021-11-09 10:42:49,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:49,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220113315] [2021-11-09 10:42:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:49,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2406 proven. 1457 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 10:42:50,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:50,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220113315] [2021-11-09 10:42:50,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220113315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:50,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326851329] [2021-11-09 10:42:50,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:42:50,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:50,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:50,515 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:50,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:42:51,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2021-11-09 10:42:51,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 10:42:51,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2786 proven. 1926 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-09 10:42:53,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326851329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:53,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:53,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-09 10:42:53,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19875531] [2021-11-09 10:42:53,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 10:42:53,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 10:42:53,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:42:53,082 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 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) [2021-11-09 10:42:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:54,472 INFO L93 Difference]: Finished difference Result 738 states and 953 transitions. [2021-11-09 10:42:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-09 10:42:54,473 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 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 176 [2021-11-09 10:42:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:54,478 INFO L225 Difference]: With dead ends: 738 [2021-11-09 10:42:54,478 INFO L226 Difference]: Without dead ends: 655 [2021-11-09 10:42:54,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3419, Invalid=13093, Unknown=0, NotChecked=0, Total=16512 [2021-11-09 10:42:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-09 10:42:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 198. [2021-11-09 10:42:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.16751269035533) internal successors, (230), 197 states have internal predecessors, (230), 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) [2021-11-09 10:42:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 230 transitions. [2021-11-09 10:42:54,516 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 230 transitions. Word has length 176 [2021-11-09 10:42:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:54,517 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 230 transitions. [2021-11-09 10:42:54,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 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) [2021-11-09 10:42:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 230 transitions. [2021-11-09 10:42:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-09 10:42:54,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:54,520 INFO L513 BasicCegarLoop]: trace histogram [64, 63, 32, 32, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:54,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-09 10:42:54,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:54,733 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:54,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1373262373, now seen corresponding path program 28 times [2021-11-09 10:42:54,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:54,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871181738] [2021-11-09 10:42:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:54,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3070 proven. 1552 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:42:55,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:55,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871181738] [2021-11-09 10:42:55,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871181738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:55,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492031596] [2021-11-09 10:42:55,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:42:55,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:55,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:55,455 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:55,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:42:56,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:42:56,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:56,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:42:56,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3070 proven. 1552 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:42:57,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492031596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:57,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:57,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-09 10:42:57,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870904413] [2021-11-09 10:42:57,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 10:42:57,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 10:42:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:42:57,149 INFO L87 Difference]: Start difference. First operand 198 states and 230 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 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) [2021-11-09 10:42:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:42:57,298 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2021-11-09 10:42:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 10:42:57,299 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 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 197 [2021-11-09 10:42:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:42:57,301 INFO L225 Difference]: With dead ends: 303 [2021-11-09 10:42:57,301 INFO L226 Difference]: Without dead ends: 202 [2021-11-09 10:42:57,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:42:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-09 10:42:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-11-09 10:42:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.165) internal successors, (233), 200 states have internal predecessors, (233), 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) [2021-11-09 10:42:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-11-09 10:42:57,332 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 197 [2021-11-09 10:42:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:42:57,332 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-11-09 10:42:57,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 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) [2021-11-09 10:42:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-11-09 10:42:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-09 10:42:57,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:42:57,335 INFO L513 BasicCegarLoop]: trace histogram [65, 64, 33, 32, 1, 1, 1, 1, 1, 1] [2021-11-09 10:42:57,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:42:57,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 10:42:57,563 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:42:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:42:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1344545294, now seen corresponding path program 29 times [2021-11-09 10:42:57,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:42:57,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257669600] [2021-11-09 10:42:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:42:57,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:42:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:42:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3164 proven. 1650 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:42:58,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:42:58,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257669600] [2021-11-09 10:42:58,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257669600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:58,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697353154] [2021-11-09 10:42:58,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:42:58,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:42:58,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:42:58,271 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:42:58,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:42:59,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-11-09 10:42:59,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:42:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 10:42:59,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:42:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3164 proven. 1650 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:42:59,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697353154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:42:59,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:42:59,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-09 10:42:59,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284296993] [2021-11-09 10:42:59,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:42:59,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:42:59,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:42:59,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:42:59,964 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 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) [2021-11-09 10:43:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:00,072 INFO L93 Difference]: Finished difference Result 306 states and 371 transitions. [2021-11-09 10:43:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:43:00,072 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 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 200 [2021-11-09 10:43:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:00,074 INFO L225 Difference]: With dead ends: 306 [2021-11-09 10:43:00,075 INFO L226 Difference]: Without dead ends: 205 [2021-11-09 10:43:00,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:43:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-09 10:43:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-11-09 10:43:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1625615763546797) internal successors, (236), 203 states have internal predecessors, (236), 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) [2021-11-09 10:43:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 236 transitions. [2021-11-09 10:43:00,107 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 236 transitions. Word has length 200 [2021-11-09 10:43:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:00,108 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 236 transitions. [2021-11-09 10:43:00,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 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) [2021-11-09 10:43:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 236 transitions. [2021-11-09 10:43:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-09 10:43:00,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:00,110 INFO L513 BasicCegarLoop]: trace histogram [66, 65, 34, 32, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:00,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:00,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:00,335 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:00,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1170711301, now seen corresponding path program 30 times [2021-11-09 10:43:00,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:00,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562787553] [2021-11-09 10:43:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:00,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3258 proven. 1751 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:43:01,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:01,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562787553] [2021-11-09 10:43:01,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562787553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:01,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11163302] [2021-11-09 10:43:01,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:43:01,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:01,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:01,100 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:01,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 10:43:02,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2021-11-09 10:43:02,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:02,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:43:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3258 proven. 1751 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:43:02,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11163302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:02,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:02,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-09 10:43:02,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757242948] [2021-11-09 10:43:02,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 10:43:02,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 10:43:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:43:02,899 INFO L87 Difference]: Start difference. First operand 204 states and 236 transitions. Second operand has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 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) [2021-11-09 10:43:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:03,078 INFO L93 Difference]: Finished difference Result 309 states and 374 transitions. [2021-11-09 10:43:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:43:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 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 203 [2021-11-09 10:43:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:03,081 INFO L225 Difference]: With dead ends: 309 [2021-11-09 10:43:03,081 INFO L226 Difference]: Without dead ends: 208 [2021-11-09 10:43:03,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:43:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-09 10:43:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-09 10:43:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 206 states have internal predecessors, (239), 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) [2021-11-09 10:43:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 239 transitions. [2021-11-09 10:43:03,115 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 239 transitions. Word has length 203 [2021-11-09 10:43:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:03,115 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 239 transitions. [2021-11-09 10:43:03,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 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) [2021-11-09 10:43:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 239 transitions. [2021-11-09 10:43:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-09 10:43:03,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:03,118 INFO L513 BasicCegarLoop]: trace histogram [67, 66, 35, 32, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:03,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:03,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 10:43:03,327 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:03,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1114480366, now seen corresponding path program 31 times [2021-11-09 10:43:03,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:03,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166427356] [2021-11-09 10:43:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:03,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3352 proven. 1855 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:43:04,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:04,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166427356] [2021-11-09 10:43:04,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166427356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:04,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122269780] [2021-11-09 10:43:04,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:43:04,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:04,084 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:04,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 10:43:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:05,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:43:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3352 proven. 1855 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:43:05,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122269780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:05,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:05,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-09 10:43:05,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306440206] [2021-11-09 10:43:05,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 10:43:05,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 10:43:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:43:05,912 INFO L87 Difference]: Start difference. First operand 207 states and 239 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 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) [2021-11-09 10:43:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:06,037 INFO L93 Difference]: Finished difference Result 312 states and 377 transitions. [2021-11-09 10:43:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 10:43:06,037 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 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 206 [2021-11-09 10:43:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:06,039 INFO L225 Difference]: With dead ends: 312 [2021-11-09 10:43:06,039 INFO L226 Difference]: Without dead ends: 211 [2021-11-09 10:43:06,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:43:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-09 10:43:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2021-11-09 10:43:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1578947368421053) internal successors, (242), 209 states have internal predecessors, (242), 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) [2021-11-09 10:43:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 242 transitions. [2021-11-09 10:43:06,075 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 242 transitions. Word has length 206 [2021-11-09 10:43:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:06,075 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 242 transitions. [2021-11-09 10:43:06,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 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) [2021-11-09 10:43:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 242 transitions. [2021-11-09 10:43:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-09 10:43:06,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:06,078 INFO L513 BasicCegarLoop]: trace histogram [68, 67, 36, 32, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:06,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-09 10:43:06,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 10:43:06,301 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:06,301 INFO L85 PathProgramCache]: Analyzing trace with hash -267176933, now seen corresponding path program 32 times [2021-11-09 10:43:06,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:06,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917492838] [2021-11-09 10:43:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:06,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3446 proven. 1962 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:43:07,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:07,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917492838] [2021-11-09 10:43:07,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917492838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:07,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976123062] [2021-11-09 10:43:07,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:07,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:07,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:07,088 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:07,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 10:43:08,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:08,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:08,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:43:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3446 proven. 1962 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:43:08,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976123062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:08,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:08,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-09 10:43:08,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786031351] [2021-11-09 10:43:08,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 10:43:08,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 10:43:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:43:08,991 INFO L87 Difference]: Start difference. First operand 210 states and 242 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 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) [2021-11-09 10:43:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:09,118 INFO L93 Difference]: Finished difference Result 315 states and 380 transitions. [2021-11-09 10:43:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:43:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 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 209 [2021-11-09 10:43:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:09,120 INFO L225 Difference]: With dead ends: 315 [2021-11-09 10:43:09,121 INFO L226 Difference]: Without dead ends: 214 [2021-11-09 10:43:09,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:43:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-09 10:43:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-11-09 10:43:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1556603773584906) internal successors, (245), 212 states have internal predecessors, (245), 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) [2021-11-09 10:43:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 245 transitions. [2021-11-09 10:43:09,154 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 245 transitions. Word has length 209 [2021-11-09 10:43:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:09,154 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 245 transitions. [2021-11-09 10:43:09,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 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) [2021-11-09 10:43:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 245 transitions. [2021-11-09 10:43:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-09 10:43:09,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:09,157 INFO L513 BasicCegarLoop]: trace histogram [69, 68, 37, 32, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:09,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:09,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:09,373 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:09,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1746793422, now seen corresponding path program 33 times [2021-11-09 10:43:09,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:09,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252996093] [2021-11-09 10:43:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:09,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3540 proven. 2072 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-09 10:43:10,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:10,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252996093] [2021-11-09 10:43:10,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252996093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:10,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504056572] [2021-11-09 10:43:10,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:43:10,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:10,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:10,342 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:10,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 10:43:11,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-11-09 10:43:11,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:11,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 10:43:11,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3998 proven. 2946 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-09 10:43:13,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504056572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:13,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:13,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-11-09 10:43:13,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432815765] [2021-11-09 10:43:13,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 10:43:13,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 10:43:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 10:43:13,730 INFO L87 Difference]: Start difference. First operand 213 states and 245 transitions. Second operand has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 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) [2021-11-09 10:43:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:15,421 INFO L93 Difference]: Finished difference Result 900 states and 1163 transitions. [2021-11-09 10:43:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-09 10:43:15,421 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 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 212 [2021-11-09 10:43:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:15,427 INFO L225 Difference]: With dead ends: 900 [2021-11-09 10:43:15,427 INFO L226 Difference]: Without dead ends: 799 [2021-11-09 10:43:15,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5440 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4745, Invalid=18511, Unknown=0, NotChecked=0, Total=23256 [2021-11-09 10:43:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-11-09 10:43:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 234. [2021-11-09 10:43:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.167381974248927) internal successors, (272), 233 states have internal predecessors, (272), 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) [2021-11-09 10:43:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-11-09 10:43:15,494 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 212 [2021-11-09 10:43:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:15,495 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-11-09 10:43:15,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 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) [2021-11-09 10:43:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-11-09 10:43:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-09 10:43:15,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:15,498 INFO L513 BasicCegarLoop]: trace histogram [76, 75, 38, 38, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:15,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-09 10:43:15,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 10:43:15,713 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:15,714 INFO L85 PathProgramCache]: Analyzing trace with hash 625478363, now seen corresponding path program 34 times [2021-11-09 10:43:15,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:15,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851686476] [2021-11-09 10:43:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:15,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4330 proven. 2185 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:16,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:16,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851686476] [2021-11-09 10:43:16,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851686476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:16,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098971157] [2021-11-09 10:43:16,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:43:16,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:16,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:16,690 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:16,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 10:43:18,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:43:18,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:18,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 10:43:18,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4330 proven. 2185 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:18,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098971157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:18,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:18,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-09 10:43:18,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698008705] [2021-11-09 10:43:18,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 10:43:18,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 10:43:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:43:18,824 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 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) [2021-11-09 10:43:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:18,955 INFO L93 Difference]: Finished difference Result 357 states and 434 transitions. [2021-11-09 10:43:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 10:43:18,956 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 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 233 [2021-11-09 10:43:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:18,957 INFO L225 Difference]: With dead ends: 357 [2021-11-09 10:43:18,957 INFO L226 Difference]: Without dead ends: 238 [2021-11-09 10:43:18,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:43:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-09 10:43:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-11-09 10:43:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.1652542372881356) internal successors, (275), 236 states have internal predecessors, (275), 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) [2021-11-09 10:43:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 275 transitions. [2021-11-09 10:43:19,008 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 275 transitions. Word has length 233 [2021-11-09 10:43:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:19,008 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 275 transitions. [2021-11-09 10:43:19,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 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) [2021-11-09 10:43:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 275 transitions. [2021-11-09 10:43:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-09 10:43:19,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:19,011 INFO L513 BasicCegarLoop]: trace histogram [77, 76, 39, 38, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:19,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:19,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 10:43:19,227 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash 378249614, now seen corresponding path program 35 times [2021-11-09 10:43:19,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:19,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485598960] [2021-11-09 10:43:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:19,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4442 proven. 2301 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:20,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:20,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485598960] [2021-11-09 10:43:20,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485598960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:20,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725039753] [2021-11-09 10:43:20,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:43:20,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:20,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:20,239 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:20,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 10:43:21,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2021-11-09 10:43:21,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:43:21,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4442 proven. 2301 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:22,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725039753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:22,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:22,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-09 10:43:22,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279628221] [2021-11-09 10:43:22,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 10:43:22,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:22,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 10:43:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:43:22,567 INFO L87 Difference]: Start difference. First operand 237 states and 275 transitions. Second operand has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 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) [2021-11-09 10:43:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:22,718 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2021-11-09 10:43:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:43:22,719 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 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 236 [2021-11-09 10:43:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:22,721 INFO L225 Difference]: With dead ends: 360 [2021-11-09 10:43:22,721 INFO L226 Difference]: Without dead ends: 241 [2021-11-09 10:43:22,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:43:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-09 10:43:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2021-11-09 10:43:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1631799163179917) internal successors, (278), 239 states have internal predecessors, (278), 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) [2021-11-09 10:43:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 278 transitions. [2021-11-09 10:43:22,770 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 278 transitions. Word has length 236 [2021-11-09 10:43:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:22,770 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 278 transitions. [2021-11-09 10:43:22,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 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) [2021-11-09 10:43:22,771 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 278 transitions. [2021-11-09 10:43:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-09 10:43:22,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:22,773 INFO L513 BasicCegarLoop]: trace histogram [78, 77, 40, 38, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:22,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-09 10:43:22,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 10:43:22,979 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:22,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1055500795, now seen corresponding path program 36 times [2021-11-09 10:43:22,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:22,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446662302] [2021-11-09 10:43:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:22,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4554 proven. 2420 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:24,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:24,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446662302] [2021-11-09 10:43:24,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446662302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:24,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151666062] [2021-11-09 10:43:24,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:43:24,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:24,017 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:24,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 10:43:25,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2021-11-09 10:43:25,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:25,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 10:43:25,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4554 proven. 2420 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:26,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151666062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:26,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:26,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-09 10:43:26,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993540153] [2021-11-09 10:43:26,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 10:43:26,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 10:43:26,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:43:26,354 INFO L87 Difference]: Start difference. First operand 240 states and 278 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 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) [2021-11-09 10:43:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:26,531 INFO L93 Difference]: Finished difference Result 363 states and 440 transitions. [2021-11-09 10:43:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 10:43:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 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 239 [2021-11-09 10:43:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:26,533 INFO L225 Difference]: With dead ends: 363 [2021-11-09 10:43:26,534 INFO L226 Difference]: Without dead ends: 244 [2021-11-09 10:43:26,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:43:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-09 10:43:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-11-09 10:43:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.1611570247933884) internal successors, (281), 242 states have internal predecessors, (281), 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) [2021-11-09 10:43:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 281 transitions. [2021-11-09 10:43:26,582 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 281 transitions. Word has length 239 [2021-11-09 10:43:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:26,583 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 281 transitions. [2021-11-09 10:43:26,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 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) [2021-11-09 10:43:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 281 transitions. [2021-11-09 10:43:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-09 10:43:26,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:26,585 INFO L513 BasicCegarLoop]: trace histogram [79, 78, 41, 38, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:26,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:26,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 10:43:26,811 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:26,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash -710922642, now seen corresponding path program 37 times [2021-11-09 10:43:26,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:26,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888503659] [2021-11-09 10:43:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:26,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4666 proven. 2542 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:27,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:27,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888503659] [2021-11-09 10:43:27,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888503659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:27,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552392768] [2021-11-09 10:43:27,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:43:27,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:27,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:27,817 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:27,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 10:43:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:29,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:43:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4666 proven. 2542 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:30,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552392768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:30,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:30,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-09 10:43:30,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025326598] [2021-11-09 10:43:30,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 10:43:30,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 10:43:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:43:30,189 INFO L87 Difference]: Start difference. First operand 243 states and 281 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 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) [2021-11-09 10:43:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:30,329 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2021-11-09 10:43:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 10:43:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 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 242 [2021-11-09 10:43:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:30,331 INFO L225 Difference]: With dead ends: 366 [2021-11-09 10:43:30,331 INFO L226 Difference]: Without dead ends: 247 [2021-11-09 10:43:30,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:43:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-09 10:43:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2021-11-09 10:43:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.1591836734693877) internal successors, (284), 245 states have internal predecessors, (284), 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) [2021-11-09 10:43:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 284 transitions. [2021-11-09 10:43:30,393 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 284 transitions. Word has length 242 [2021-11-09 10:43:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:30,394 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 284 transitions. [2021-11-09 10:43:30,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 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) [2021-11-09 10:43:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 284 transitions. [2021-11-09 10:43:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-09 10:43:30,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:30,397 INFO L513 BasicCegarLoop]: trace histogram [80, 79, 42, 38, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:30,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:30,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:43:30,623 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2002743579, now seen corresponding path program 38 times [2021-11-09 10:43:30,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:30,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860528316] [2021-11-09 10:43:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:30,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4778 proven. 2667 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:31,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:31,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860528316] [2021-11-09 10:43:31,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860528316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:31,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100749771] [2021-11-09 10:43:31,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:43:31,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:31,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:31,632 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:31,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 10:43:33,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:43:33,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 10:43:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4778 proven. 2667 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:33,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100749771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:33,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:33,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-09 10:43:33,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115575747] [2021-11-09 10:43:33,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 10:43:33,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:33,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 10:43:33,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:43:33,987 INFO L87 Difference]: Start difference. First operand 246 states and 284 transitions. Second operand has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 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) [2021-11-09 10:43:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:34,150 INFO L93 Difference]: Finished difference Result 369 states and 446 transitions. [2021-11-09 10:43:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:43:34,150 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 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 245 [2021-11-09 10:43:34,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:34,153 INFO L225 Difference]: With dead ends: 369 [2021-11-09 10:43:34,153 INFO L226 Difference]: Without dead ends: 250 [2021-11-09 10:43:34,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:43:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-09 10:43:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-11-09 10:43:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.157258064516129) internal successors, (287), 248 states have internal predecessors, (287), 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) [2021-11-09 10:43:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-11-09 10:43:34,204 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 245 [2021-11-09 10:43:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:34,204 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-11-09 10:43:34,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 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) [2021-11-09 10:43:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-11-09 10:43:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-09 10:43:34,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:34,207 INFO L513 BasicCegarLoop]: trace histogram [81, 80, 43, 38, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:34,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:34,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:34,423 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:34,423 INFO L85 PathProgramCache]: Analyzing trace with hash 663720782, now seen corresponding path program 39 times [2021-11-09 10:43:34,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:34,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710235054] [2021-11-09 10:43:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:34,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 4890 proven. 2795 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-09 10:43:35,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:35,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710235054] [2021-11-09 10:43:35,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710235054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:35,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405908080] [2021-11-09 10:43:35,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:43:35,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:35,655 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:35,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 10:43:37,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2021-11-09 10:43:37,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 10:43:37,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 5426 proven. 4182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-09 10:43:40,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405908080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:40,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:40,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2021-11-09 10:43:40,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621164504] [2021-11-09 10:43:40,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-09 10:43:40,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:40,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-09 10:43:40,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 10:43:40,020 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 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) [2021-11-09 10:43:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:42,146 INFO L93 Difference]: Finished difference Result 1062 states and 1373 transitions. [2021-11-09 10:43:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-09 10:43:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 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 248 [2021-11-09 10:43:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:42,151 INFO L225 Difference]: With dead ends: 1062 [2021-11-09 10:43:42,152 INFO L226 Difference]: Without dead ends: 943 [2021-11-09 10:43:42,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6287, Invalid=24865, Unknown=0, NotChecked=0, Total=31152 [2021-11-09 10:43:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-09 10:43:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 270. [2021-11-09 10:43:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1672862453531598) internal successors, (314), 269 states have internal predecessors, (314), 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) [2021-11-09 10:43:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 314 transitions. [2021-11-09 10:43:42,227 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 314 transitions. Word has length 248 [2021-11-09 10:43:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:42,228 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 314 transitions. [2021-11-09 10:43:42,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 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) [2021-11-09 10:43:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 314 transitions. [2021-11-09 10:43:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-09 10:43:42,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:42,230 INFO L513 BasicCegarLoop]: trace histogram [88, 87, 44, 44, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:42,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:42,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:42,455 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash 665450459, now seen corresponding path program 40 times [2021-11-09 10:43:42,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:42,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033787025] [2021-11-09 10:43:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:42,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5806 proven. 2926 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-11-09 10:43:43,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:43,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033787025] [2021-11-09 10:43:43,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033787025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:43,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863704139] [2021-11-09 10:43:43,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:43:43,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:43,453 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:43,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 10:43:45,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:43:45,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 10:43:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5806 proven. 2926 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-11-09 10:43:46,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863704139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:46,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:46,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-09 10:43:46,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652706773] [2021-11-09 10:43:46,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 10:43:46,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 10:43:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:43:46,155 INFO L87 Difference]: Start difference. First operand 270 states and 314 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 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) [2021-11-09 10:43:46,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:46,367 INFO L93 Difference]: Finished difference Result 411 states and 500 transitions. [2021-11-09 10:43:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 10:43:46,367 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 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 269 [2021-11-09 10:43:46,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:46,369 INFO L225 Difference]: With dead ends: 411 [2021-11-09 10:43:46,369 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 10:43:46,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:43:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 10:43:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-11-09 10:43:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.1654411764705883) internal successors, (317), 272 states have internal predecessors, (317), 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) [2021-11-09 10:43:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 317 transitions. [2021-11-09 10:43:46,436 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 317 transitions. Word has length 269 [2021-11-09 10:43:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:46,439 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 317 transitions. [2021-11-09 10:43:46,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 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) [2021-11-09 10:43:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 317 transitions. [2021-11-09 10:43:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-09 10:43:46,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:46,442 INFO L513 BasicCegarLoop]: trace histogram [89, 88, 45, 44, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:46,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:46,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:46,667 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:46,667 INFO L85 PathProgramCache]: Analyzing trace with hash 129200398, now seen corresponding path program 41 times [2021-11-09 10:43:46,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:46,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118074667] [2021-11-09 10:43:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:46,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5936 proven. 3060 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-11-09 10:43:47,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:47,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118074667] [2021-11-09 10:43:47,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118074667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:47,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230181311] [2021-11-09 10:43:47,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:43:47,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:47,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:47,684 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:47,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 10:43:49,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2021-11-09 10:43:49,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 10:43:49,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5936 proven. 3060 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-11-09 10:43:50,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230181311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:50,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:50,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-09 10:43:50,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069571497] [2021-11-09 10:43:50,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 10:43:50,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 10:43:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:43:50,271 INFO L87 Difference]: Start difference. First operand 273 states and 317 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 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) [2021-11-09 10:43:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:50,427 INFO L93 Difference]: Finished difference Result 414 states and 503 transitions. [2021-11-09 10:43:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 10:43:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 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 272 [2021-11-09 10:43:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:50,429 INFO L225 Difference]: With dead ends: 414 [2021-11-09 10:43:50,429 INFO L226 Difference]: Without dead ends: 277 [2021-11-09 10:43:50,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:43:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-09 10:43:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2021-11-09 10:43:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.1636363636363636) internal successors, (320), 275 states have internal predecessors, (320), 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) [2021-11-09 10:43:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2021-11-09 10:43:50,488 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 272 [2021-11-09 10:43:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:50,488 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2021-11-09 10:43:50,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 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) [2021-11-09 10:43:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2021-11-09 10:43:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-09 10:43:50,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:50,490 INFO L513 BasicCegarLoop]: trace histogram [90, 89, 46, 44, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:50,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:50,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:50,691 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1981974267, now seen corresponding path program 42 times [2021-11-09 10:43:50,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:50,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695803626] [2021-11-09 10:43:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:50,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:43:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 6066 proven. 3197 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-11-09 10:43:51,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:43:51,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695803626] [2021-11-09 10:43:51,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695803626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:51,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002400449] [2021-11-09 10:43:51,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:43:51,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:43:51,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:43:51,922 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:43:51,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 10:43:53,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 90 check-sat command(s) [2021-11-09 10:43:53,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:43:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-09 10:43:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:43:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 6251 proven. 5634 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-09 10:43:56,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002400449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:43:56,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:43:56,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2021-11-09 10:43:56,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143655926] [2021-11-09 10:43:56,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-09 10:43:56,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:43:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-09 10:43:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 10:43:56,524 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 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) [2021-11-09 10:43:58,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:43:58,599 INFO L93 Difference]: Finished difference Result 816 states and 1040 transitions. [2021-11-09 10:43:58,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-11-09 10:43:58,600 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 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 275 [2021-11-09 10:43:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:43:58,603 INFO L225 Difference]: With dead ends: 816 [2021-11-09 10:43:58,603 INFO L226 Difference]: Without dead ends: 679 [2021-11-09 10:43:58,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8419 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7139, Invalid=28393, Unknown=0, NotChecked=0, Total=35532 [2021-11-09 10:43:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-11-09 10:43:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 288. [2021-11-09 10:43:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1672473867595818) internal successors, (335), 287 states have internal predecessors, (335), 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) [2021-11-09 10:43:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2021-11-09 10:43:58,662 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 275 [2021-11-09 10:43:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:43:58,662 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2021-11-09 10:43:58,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 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) [2021-11-09 10:43:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2021-11-09 10:43:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-09 10:43:58,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:43:58,665 INFO L513 BasicCegarLoop]: trace histogram [94, 93, 47, 47, 1, 1, 1, 1, 1, 1] [2021-11-09 10:43:58,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 10:43:58,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 10:43:58,886 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:43:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:43:58,887 INFO L85 PathProgramCache]: Analyzing trace with hash -738002307, now seen corresponding path program 43 times [2021-11-09 10:43:58,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:43:58,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502294334] [2021-11-09 10:43:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:43:58,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:43:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6625 proven. 3337 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-09 10:44:00,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:00,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502294334] [2021-11-09 10:44:00,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502294334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:00,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062273318] [2021-11-09 10:44:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:00,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:00,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:00,084 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:00,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 10:44:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:44:02,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6625 proven. 3337 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-09 10:44:02,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062273318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:02,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:02,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-09 10:44:02,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427636801] [2021-11-09 10:44:02,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 10:44:02,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:02,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 10:44:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:44:02,924 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 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) [2021-11-09 10:44:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:03,097 INFO L93 Difference]: Finished difference Result 438 states and 533 transitions. [2021-11-09 10:44:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:44:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 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 287 [2021-11-09 10:44:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:03,099 INFO L225 Difference]: With dead ends: 438 [2021-11-09 10:44:03,100 INFO L226 Difference]: Without dead ends: 292 [2021-11-09 10:44:03,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:44:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-09 10:44:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-11-09 10:44:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1655172413793105) internal successors, (338), 290 states have internal predecessors, (338), 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) [2021-11-09 10:44:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 338 transitions. [2021-11-09 10:44:03,166 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 338 transitions. Word has length 287 [2021-11-09 10:44:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:03,166 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 338 transitions. [2021-11-09 10:44:03,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 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) [2021-11-09 10:44:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 338 transitions. [2021-11-09 10:44:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-09 10:44:03,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:03,169 INFO L513 BasicCegarLoop]: trace histogram [95, 94, 48, 47, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:03,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:03,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 10:44:03,391 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1527665424, now seen corresponding path program 44 times [2021-11-09 10:44:03,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:03,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28572135] [2021-11-09 10:44:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:03,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6764 proven. 3480 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-09 10:44:04,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:04,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28572135] [2021-11-09 10:44:04,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28572135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:04,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247968119] [2021-11-09 10:44:04,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:04,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:04,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:04,682 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:04,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 10:44:06,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:06,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:44:06,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6764 proven. 3480 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-09 10:44:07,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247968119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:07,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:07,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-09 10:44:07,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793573235] [2021-11-09 10:44:07,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 10:44:07,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:07,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 10:44:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 10:44:07,648 INFO L87 Difference]: Start difference. First operand 291 states and 338 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 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) [2021-11-09 10:44:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:07,878 INFO L93 Difference]: Finished difference Result 441 states and 536 transitions. [2021-11-09 10:44:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 10:44:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 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 290 [2021-11-09 10:44:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:07,881 INFO L225 Difference]: With dead ends: 441 [2021-11-09 10:44:07,882 INFO L226 Difference]: Without dead ends: 295 [2021-11-09 10:44:07,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 10:44:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-09 10:44:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-11-09 10:44:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.1638225255972696) internal successors, (341), 293 states have internal predecessors, (341), 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) [2021-11-09 10:44:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 341 transitions. [2021-11-09 10:44:07,967 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 341 transitions. Word has length 290 [2021-11-09 10:44:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:07,967 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 341 transitions. [2021-11-09 10:44:07,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 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) [2021-11-09 10:44:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 341 transitions. [2021-11-09 10:44:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-09 10:44:07,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:07,970 INFO L513 BasicCegarLoop]: trace histogram [96, 95, 49, 47, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:08,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:08,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 10:44:08,187 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1449263517, now seen corresponding path program 45 times [2021-11-09 10:44:08,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:08,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139631555] [2021-11-09 10:44:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:08,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 6903 proven. 3626 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-09 10:44:09,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:09,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139631555] [2021-11-09 10:44:09,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139631555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:09,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140049776] [2021-11-09 10:44:09,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:09,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:09,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:09,550 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:09,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 10:44:11,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2021-11-09 10:44:11,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:11,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-09 10:44:11,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7100 proven. 6441 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-09 10:44:15,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140049776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:15,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:15,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2021-11-09 10:44:15,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118515616] [2021-11-09 10:44:15,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-09 10:44:15,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-09 10:44:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 10:44:15,133 INFO L87 Difference]: Start difference. First operand 294 states and 341 transitions. Second operand has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 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) [2021-11-09 10:44:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:19,823 INFO L93 Difference]: Finished difference Result 1049 states and 1288 transitions. [2021-11-09 10:44:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2021-11-09 10:44:19,824 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 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 293 [2021-11-09 10:44:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:19,830 INFO L225 Difference]: With dead ends: 1049 [2021-11-09 10:44:19,830 INFO L226 Difference]: Without dead ends: 903 [2021-11-09 10:44:19,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17740 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12989, Invalid=48763, Unknown=0, NotChecked=0, Total=61752 [2021-11-09 10:44:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-11-09 10:44:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 306. [2021-11-09 10:44:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1672131147540983) internal successors, (356), 305 states have internal predecessors, (356), 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) [2021-11-09 10:44:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 356 transitions. [2021-11-09 10:44:19,955 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 356 transitions. Word has length 293 [2021-11-09 10:44:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:19,956 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 356 transitions. [2021-11-09 10:44:19,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 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) [2021-11-09 10:44:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 356 transitions. [2021-11-09 10:44:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-09 10:44:19,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:19,959 INFO L513 BasicCegarLoop]: trace histogram [100, 99, 50, 50, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:20,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-09 10:44:20,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 10:44:20,175 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:20,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:20,175 INFO L85 PathProgramCache]: Analyzing trace with hash -933268261, now seen corresponding path program 46 times [2021-11-09 10:44:20,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:20,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611158178] [2021-11-09 10:44:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:20,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7203 proven. 7500 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-09 10:44:21,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:21,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611158178] [2021-11-09 10:44:21,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611158178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:21,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041978128] [2021-11-09 10:44:21,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:21,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:21,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:21,800 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:21,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 10:44:24,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:24,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:24,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-09 10:44:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7401 proven. 7302 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-09 10:44:25,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041978128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:25,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:25,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 54 [2021-11-09 10:44:25,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031363558] [2021-11-09 10:44:25,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 10:44:25,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:25,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 10:44:25,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 10:44:25,208 INFO L87 Difference]: Start difference. First operand 306 states and 356 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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) [2021-11-09 10:44:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:25,725 INFO L93 Difference]: Finished difference Result 461 states and 561 transitions. [2021-11-09 10:44:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 10:44:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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 305 [2021-11-09 10:44:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:25,728 INFO L225 Difference]: With dead ends: 461 [2021-11-09 10:44:25,728 INFO L226 Difference]: Without dead ends: 457 [2021-11-09 10:44:25,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 10:44:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-09 10:44:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 309. [2021-11-09 10:44:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.1688311688311688) internal successors, (360), 308 states have internal predecessors, (360), 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) [2021-11-09 10:44:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2021-11-09 10:44:25,844 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 305 [2021-11-09 10:44:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:25,846 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2021-11-09 10:44:25,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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) [2021-11-09 10:44:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2021-11-09 10:44:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-09 10:44:25,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:25,849 INFO L513 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:25,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:26,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:26,063 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:26,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:26,063 INFO L85 PathProgramCache]: Analyzing trace with hash -338193904, now seen corresponding path program 47 times [2021-11-09 10:44:26,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:26,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240955574] [2021-11-09 10:44:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:26,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:30,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:30,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240955574] [2021-11-09 10:44:30,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240955574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:30,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314704766] [2021-11-09 10:44:30,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:30,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:30,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:30,526 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:30,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 10:44:33,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 101 check-sat command(s) [2021-11-09 10:44:33,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-09 10:44:33,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:38,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314704766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:38,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:38,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104] total 155 [2021-11-09 10:44:38,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180431953] [2021-11-09 10:44:38,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-11-09 10:44:38,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:38,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-11-09 10:44:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=21012, Unknown=0, NotChecked=0, Total=23870 [2021-11-09 10:44:38,687 INFO L87 Difference]: Start difference. First operand 309 states and 360 transitions. Second operand has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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) [2021-11-09 10:44:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:48,520 INFO L93 Difference]: Finished difference Result 4542 states and 5921 transitions. [2021-11-09 10:44:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-09 10:44:48,520 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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 308 [2021-11-09 10:44:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:48,541 INFO L225 Difference]: With dead ends: 4542 [2021-11-09 10:44:48,541 INFO L226 Difference]: Without dead ends: 4382 [2021-11-09 10:44:48,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7851 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2863, Invalid=21317, Unknown=0, NotChecked=0, Total=24180 [2021-11-09 10:44:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-11-09 10:44:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 4186. [2021-11-09 10:44:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 1.0241338112305853) internal successors, (4286), 4185 states have internal predecessors, (4286), 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) [2021-11-09 10:44:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 4286 transitions. [2021-11-09 10:44:50,687 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 4286 transitions. Word has length 308 [2021-11-09 10:44:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:50,687 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 4286 transitions. [2021-11-09 10:44:50,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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) [2021-11-09 10:44:50,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 4286 transitions. [2021-11-09 10:44:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-09 10:44:50,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:50,690 INFO L513 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:50,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:50,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 10:44:50,890 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:50,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2103022405, now seen corresponding path program 48 times [2021-11-09 10:44:50,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:50,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624170054] [2021-11-09 10:44:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:50,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-09 10:44:52,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:52,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624170054] [2021-11-09 10:44:52,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624170054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:52,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731220409] [2021-11-09 10:44:52,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:52,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:52,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:52,418 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:52,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 10:44:54,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 102 check-sat command(s) [2021-11-09 10:44:54,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:54,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-09 10:44:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-09 10:44:55,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731220409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:55,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:55,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 55 [2021-11-09 10:44:55,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100552375] [2021-11-09 10:44:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 10:44:55,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 10:44:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:44:55,587 INFO L87 Difference]: Start difference. First operand 4186 states and 4286 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 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) [2021-11-09 10:44:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:55,907 INFO L93 Difference]: Finished difference Result 4337 states and 4437 transitions. [2021-11-09 10:44:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 10:44:55,907 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 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 311 [2021-11-09 10:44:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:55,908 INFO L225 Difference]: With dead ends: 4337 [2021-11-09 10:44:55,908 INFO L226 Difference]: Without dead ends: 0 [2021-11-09 10:44:55,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:44:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-09 10:44:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-09 10:44:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-09 10:44:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-09 10:44:55,913 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2021-11-09 10:44:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:55,913 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 10:44:55,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 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) [2021-11-09 10:44:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-09 10:44:55,914 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-09 10:44:55,916 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:44:55,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-09 10:44:56,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:56,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-09 10:44:56,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:44:56,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:44:56,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:45:11,781 WARN L207 SmtUtils]: Spent 15.64 s on a formula simplification. DAG size of input: 2236 DAG size of output: 1660 [2021-11-09 10:46:01,535 WARN L207 SmtUtils]: Spent 49.72 s on a formula simplification. DAG size of input: 1611 DAG size of output: 458 [2021-11-09 10:46:01,543 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-09 10:46:01,543 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-11-09 10:46:01,543 INFO L857 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-11-09 10:46:01,544 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-09 10:46:01,544 INFO L860 garLoopResultBuilder]: At program point L38(lines 24 39) the Hoare annotation is: true [2021-11-09 10:46:01,544 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-09 10:46:01,544 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-09 10:46:01,545 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-09 10:46:01,548 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse10 (<= ULTIMATE.start_main_~y~0 44)) (.cse11 (<= 44 ULTIMATE.start_main_~y~0)) (.cse24 (<= ULTIMATE.start_main_~y~0 42)) (.cse25 (<= 42 ULTIMATE.start_main_~y~0)) (.cse22 (<= ULTIMATE.start_main_~y~0 22)) (.cse23 (<= 22 ULTIMATE.start_main_~y~0)) (.cse41 (<= 35 ULTIMATE.start_main_~y~0)) (.cse42 (<= ULTIMATE.start_main_~y~0 35)) (.cse59 (<= ULTIMATE.start_main_~y~0 39)) (.cse60 (<= 39 ULTIMATE.start_main_~y~0)) (.cse16 (<= ULTIMATE.start_main_~y~0 16)) (.cse17 (<= 16 ULTIMATE.start_main_~y~0)) (.cse6 (<= ULTIMATE.start_main_~y~0 37)) (.cse7 (<= 37 ULTIMATE.start_main_~y~0)) (.cse45 (<= 36 ULTIMATE.start_main_~y~0)) (.cse46 (<= ULTIMATE.start_main_~y~0 36)) (.cse37 (<= 32 ULTIMATE.start_main_~y~0)) (.cse38 (<= ULTIMATE.start_main_~y~0 32)) (.cse73 (<= 12 ULTIMATE.start_main_~y~0)) (.cse74 (<= ULTIMATE.start_main_~y~0 12)) (.cse8 (<= ULTIMATE.start_main_~y~0 46)) (.cse9 (<= 46 ULTIMATE.start_main_~y~0)) (.cse71 (<= 2 ULTIMATE.start_main_~y~0)) (.cse72 (<= ULTIMATE.start_main_~y~0 2)) (.cse65 (<= 11 ULTIMATE.start_main_~y~0)) (.cse66 (<= ULTIMATE.start_main_~y~0 11)) (.cse47 (<= 47 ULTIMATE.start_main_~y~0)) (.cse48 (<= ULTIMATE.start_main_~y~0 47)) (.cse49 (<= ULTIMATE.start_main_~y~0 33)) (.cse50 (<= 33 ULTIMATE.start_main_~y~0)) (.cse57 (<= 26 ULTIMATE.start_main_~y~0)) (.cse58 (<= ULTIMATE.start_main_~y~0 26)) (.cse12 (<= 41 ULTIMATE.start_main_~y~0)) (.cse13 (<= ULTIMATE.start_main_~y~0 41)) (.cse29 (<= 8 ULTIMATE.start_main_~y~0)) (.cse30 (<= ULTIMATE.start_main_~y~0 8)) (.cse77 (<= ULTIMATE.start_main_~y~0 45)) (.cse78 (<= 45 ULTIMATE.start_main_~y~0)) (.cse51 (<= ULTIMATE.start_main_~y~0 30)) (.cse52 (<= 30 ULTIMATE.start_main_~y~0)) (.cse39 (<= 15 ULTIMATE.start_main_~y~0)) (.cse40 (<= ULTIMATE.start_main_~y~0 15)) (.cse27 (<= 40 ULTIMATE.start_main_~y~0)) (.cse28 (<= ULTIMATE.start_main_~y~0 40)) (.cse2 (<= ULTIMATE.start_main_~y~0 20)) (.cse3 (<= 20 ULTIMATE.start_main_~y~0)) (.cse31 (<= 29 ULTIMATE.start_main_~y~0)) (.cse32 (<= ULTIMATE.start_main_~y~0 29)) (.cse20 (<= 10 ULTIMATE.start_main_~y~0)) (.cse21 (<= ULTIMATE.start_main_~y~0 10)) (.cse79 (<= 48 ULTIMATE.start_main_~y~0)) (.cse80 (<= ULTIMATE.start_main_~y~0 48)) (.cse35 (<= ULTIMATE.start_main_~y~0 4)) (.cse36 (<= 4 ULTIMATE.start_main_~y~0)) (.cse43 (<= 7 ULTIMATE.start_main_~y~0)) (.cse44 (<= ULTIMATE.start_main_~y~0 7)) (.cse61 (<= 25 ULTIMATE.start_main_~y~0)) (.cse62 (<= ULTIMATE.start_main_~y~0 25)) (.cse69 (<= 19 ULTIMATE.start_main_~y~0)) (.cse70 (<= ULTIMATE.start_main_~y~0 19)) (.cse85 (<= 1 ULTIMATE.start_main_~y~0)) (.cse86 (<= ULTIMATE.start_main_~y~0 1)) (.cse67 (<= 38 ULTIMATE.start_main_~y~0)) (.cse68 (<= ULTIMATE.start_main_~y~0 38)) (.cse63 (<= ULTIMATE.start_main_~y~0 14)) (.cse64 (<= 14 ULTIMATE.start_main_~y~0)) (.cse18 (<= ULTIMATE.start_main_~y~0 6)) (.cse19 (<= 6 ULTIMATE.start_main_~y~0)) (.cse53 (<= ULTIMATE.start_main_~y~0 21)) (.cse54 (<= 21 ULTIMATE.start_main_~y~0)) (.cse55 (<= 5 ULTIMATE.start_main_~y~0)) (.cse56 (<= ULTIMATE.start_main_~y~0 5)) (.cse4 (<= 9 ULTIMATE.start_main_~y~0)) (.cse5 (<= ULTIMATE.start_main_~y~0 9)) (.cse81 (<= 28 ULTIMATE.start_main_~y~0)) (.cse82 (<= ULTIMATE.start_main_~y~0 28)) (.cse89 (<= ULTIMATE.start_main_~y~0 34)) (.cse90 (<= 34 ULTIMATE.start_main_~y~0)) (.cse26 (= ULTIMATE.start_main_~y~0 0)) (.cse0 (<= ULTIMATE.start_main_~y~0 24)) (.cse1 (<= 24 ULTIMATE.start_main_~y~0)) (.cse93 (<= ULTIMATE.start_main_~y~0 23)) (.cse94 (<= 23 ULTIMATE.start_main_~y~0)) (.cse83 (<= 27 ULTIMATE.start_main_~y~0)) (.cse84 (<= ULTIMATE.start_main_~y~0 27)) (.cse33 (<= 18 ULTIMATE.start_main_~y~0)) (.cse34 (<= ULTIMATE.start_main_~y~0 18)) (.cse97 (<= ULTIMATE.start_main_~y~0 3)) (.cse98 (<= 3 ULTIMATE.start_main_~y~0)) (.cse91 (<= ULTIMATE.start_main_~y~0 49)) (.cse92 (<= 49 ULTIMATE.start_main_~y~0)) (.cse14 (<= ULTIMATE.start_main_~y~0 13)) (.cse15 (<= 13 ULTIMATE.start_main_~y~0)) (.cse87 (<= ULTIMATE.start_main_~y~0 17)) (.cse88 (<= 17 ULTIMATE.start_main_~y~0)) (.cse95 (<= ULTIMATE.start_main_~y~0 31)) (.cse96 (<= 31 ULTIMATE.start_main_~y~0)) (.cse75 (<= 43 ULTIMATE.start_main_~y~0)) (.cse76 (<= ULTIMATE.start_main_~y~0 43))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~x~0 24)) (and (= ULTIMATE.start_main_~x~0 20) .cse2 .cse3) (and .cse4 (= ULTIMATE.start_main_~x~0 9) .cse5) (and (<= ULTIMATE.start_main_~x~0 63) .cse6 .cse7 (<= 63 ULTIMATE.start_main_~x~0)) (and .cse8 (= ULTIMATE.start_main_~x~0 46) .cse9) (and (= ULTIMATE.start_main_~x~0 44) .cse10 .cse11) (and (= 41 ULTIMATE.start_main_~x~0) .cse12 .cse13) (and .cse14 (<= ULTIMATE.start_main_~x~0 87) .cse15 (<= 87 ULTIMATE.start_main_~x~0)) (and .cse16 .cse17 (= ULTIMATE.start_main_~x~0 16)) (and .cse18 (= ULTIMATE.start_main_~x~0 6) .cse19) (and (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) .cse10 .cse11) (and .cse20 (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 90) .cse21) (and .cse22 (<= 78 ULTIMATE.start_main_~x~0) .cse23 (<= ULTIMATE.start_main_~x~0 78)) (and .cse24 .cse25 (= ULTIMATE.start_main_~x~0 42)) (and .cse26 (= ULTIMATE.start_main_~x~0 0)) (and .cse24 .cse25 (<= 58 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 58)) (and .cse27 .cse28 (<= ULTIMATE.start_main_~x~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 8) .cse29 .cse30) (and .cse31 .cse32 (= ULTIMATE.start_main_~x~0 29)) (and (<= ULTIMATE.start_main_~x~0 82) .cse33 .cse34 (<= 82 ULTIMATE.start_main_~x~0)) (and (<= 96 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 96) .cse35 .cse36) (and .cse37 (= ULTIMATE.start_main_~x~0 32) .cse38) (and .cse39 .cse40 (= ULTIMATE.start_main_~x~0 15)) (and .cse41 .cse42 (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~x~0)) (and .cse43 .cse44 (= ULTIMATE.start_main_~x~0 7)) (and (= ULTIMATE.start_main_~x~0 36) .cse45 .cse46) (and .cse47 (= ULTIMATE.start_main_~x~0 47) .cse48) (and .cse49 (<= 67 ULTIMATE.start_main_~x~0) .cse50 (<= ULTIMATE.start_main_~x~0 67)) (and .cse51 .cse52 (= ULTIMATE.start_main_~x~0 30)) (and .cse22 .cse23 (= ULTIMATE.start_main_~x~0 22)) (and (= ULTIMATE.start_main_~x~0 35) .cse41 .cse42) (and .cse53 (<= ULTIMATE.start_main_~x~0 79) .cse54 (<= 79 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 5) .cse55 .cse56) (and (= ULTIMATE.start_main_~x~0 26) .cse57 .cse58) (and (<= 61 ULTIMATE.start_main_~x~0) .cse59 (<= ULTIMATE.start_main_~x~0 61) .cse60) (and .cse61 (= ULTIMATE.start_main_~x~0 25) .cse62) (and (= ULTIMATE.start_main_~x~0 39) .cse59 .cse60) (and .cse16 .cse17 (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~x~0)) (and .cse63 (<= 86 ULTIMATE.start_main_~x~0) .cse64 (<= ULTIMATE.start_main_~x~0 86)) (and .cse6 (= ULTIMATE.start_main_~x~0 37) .cse7) (and .cse65 (= ULTIMATE.start_main_~x~0 11) .cse66) (and .cse67 (<= ULTIMATE.start_main_~x~0 62) .cse68 (<= 62 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) .cse45 .cse46) (and (<= 68 ULTIMATE.start_main_~x~0) .cse37 (<= ULTIMATE.start_main_~x~0 68) .cse38) (and (<= 81 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 81) .cse69 .cse70) (and .cse71 .cse72 (= ULTIMATE.start_main_~x~0 2)) (and .cse73 .cse74 (= ULTIMATE.start_main_~x~0 12)) (and .cse73 .cse74 (<= 88 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 88)) (and (<= 54 ULTIMATE.start_main_~x~0) .cse8 (<= ULTIMATE.start_main_~x~0 54) .cse9) (and .cse71 .cse72 (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (= ULTIMATE.start_main_~x~0 43) .cse75 .cse76) (and (<= ULTIMATE.start_main_~x~0 55) .cse77 .cse78 (<= 55 ULTIMATE.start_main_~x~0)) (and .cse65 (<= 89 ULTIMATE.start_main_~x~0) .cse66 (<= ULTIMATE.start_main_~x~0 89)) (and .cse47 (<= ULTIMATE.start_main_~x~0 53) (<= 53 ULTIMATE.start_main_~x~0) .cse48) (and .cse79 .cse80 (= ULTIMATE.start_main_~x~0 48)) (and (= ULTIMATE.start_main_~x~0 33) .cse49 .cse50) (and (<= 74 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 74) .cse57 .cse58) (and .cse81 (<= ULTIMATE.start_main_~x~0 72) .cse82 (<= 72 ULTIMATE.start_main_~x~0)) (and .cse12 (<= 59 ULTIMATE.start_main_~x~0) .cse13 (<= ULTIMATE.start_main_~x~0 59)) (and (<= ULTIMATE.start_main_~x~0 92) .cse29 (<= 92 ULTIMATE.start_main_~x~0) .cse30) (and .cse77 (= ULTIMATE.start_main_~x~0 45) .cse78) (and .cse83 .cse84 (= ULTIMATE.start_main_~x~0 27)) (and (<= 70 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 70) .cse51 .cse52) (and .cse39 .cse40 (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0)) (and .cse27 .cse28 (= 40 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 99) (<= 99 ULTIMATE.start_main_~x~0) .cse85 .cse86) (and (<= ULTIMATE.start_main_~x~0 80) .cse2 .cse3 (<= 80 ULTIMATE.start_main_~x~0)) (and (<= 71 ULTIMATE.start_main_~x~0) .cse31 .cse32 (<= ULTIMATE.start_main_~x~0 71)) (and .cse20 (= ULTIMATE.start_main_~x~0 10) .cse21) (and .cse79 (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 52) .cse80) (and .cse87 (= ULTIMATE.start_main_~x~0 17) .cse88) (and .cse89 (= ULTIMATE.start_main_~x~0 34) .cse90) (and (= ULTIMATE.start_main_~x~0 4) .cse35 .cse36) (and (<= ULTIMATE.start_main_~x~0 93) .cse43 .cse44 (<= 93 ULTIMATE.start_main_~x~0)) (and .cse61 (<= 75 ULTIMATE.start_main_~x~0) .cse62 (<= ULTIMATE.start_main_~x~0 75)) (and (= 19 ULTIMATE.start_main_~x~0) .cse69 .cse70) (and (= ULTIMATE.start_main_~x~0 1) .cse85 .cse86) (and .cse67 (= ULTIMATE.start_main_~x~0 38) .cse68) (and .cse63 .cse64 (= ULTIMATE.start_main_~x~0 14)) (and .cse18 (<= 94 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 94) .cse19) (and .cse53 .cse54 (= ULTIMATE.start_main_~x~0 21)) (and .cse91 .cse92 (= ULTIMATE.start_main_~x~0 49)) (and (= 23 ULTIMATE.start_main_~x~0) .cse93 .cse94) (and .cse55 .cse56 (<= 95 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 95)) (and (<= ULTIMATE.start_main_~x~0 69) .cse95 (<= 69 ULTIMATE.start_main_~x~0) .cse96) (and (<= ULTIMATE.start_main_~x~0 91) .cse4 (<= 91 ULTIMATE.start_main_~x~0) .cse5) (and .cse81 .cse82 (= ULTIMATE.start_main_~x~0 28)) (and (= ULTIMATE.start_main_~x~0 3) .cse97 .cse98) (and .cse89 (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 66) .cse90) (and .cse26 (< 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 100)) (and .cse0 .cse1 (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (and .cse93 (<= 77 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 77) .cse94) (and .cse83 (<= 73 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 73) .cse84) (and .cse33 .cse34 (= ULTIMATE.start_main_~x~0 18)) (and .cse97 (<= ULTIMATE.start_main_~x~0 97) .cse98 (<= 97 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 50) (<= 50 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~x~0)) (and .cse91 (<= ULTIMATE.start_main_~x~0 51) .cse92 (<= 51 ULTIMATE.start_main_~x~0)) (and .cse14 .cse15 (= ULTIMATE.start_main_~x~0 13)) (and .cse87 .cse88 (<= 83 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 83)) (and .cse95 (= ULTIMATE.start_main_~x~0 31) .cse96) (and (<= 57 ULTIMATE.start_main_~x~0) .cse75 .cse76 (<= ULTIMATE.start_main_~x~0 57)))) [2021-11-09 10:46:01,549 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 36) no Hoare annotation was computed. [2021-11-09 10:46:01,550 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-09 10:46:01,550 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-09 10:46:01,550 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-11-09 10:46:01,554 INFO L731 BasicCegarLoop]: Path program histogram: [48, 1, 1, 1] [2021-11-09 10:46:01,556 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 10:46:01,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:46:01 BoogieIcfgContainer [2021-11-09 10:46:01,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 10:46:01,619 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 10:46:01,619 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 10:46:01,620 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 10:46:01,620 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:42:07" (3/4) ... [2021-11-09 10:46:01,624 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-09 10:46:01,635 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-09 10:46:01,636 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-09 10:46:01,636 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 10:46:01,636 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 10:46:01,706 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 10:46:01,706 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 10:46:01,708 INFO L168 Benchmark]: Toolchain (without parser) took 235383.37 ms. Allocated memory was 90.2 MB in the beginning and 3.0 GB in the end (delta: 2.9 GB). Free memory was 61.6 MB in the beginning and 2.2 GB in the end (delta: -2.1 GB). Peak memory consumption was 821.9 MB. Max. memory is 16.1 GB. [2021-11-09 10:46:01,708 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:46:01,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.08 ms. Allocated memory was 90.2 MB in the beginning and 125.8 MB in the end (delta: 35.7 MB). Free memory was 61.4 MB in the beginning and 102.1 MB in the end (delta: -40.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:46:01,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.46 ms. Allocated memory is still 125.8 MB. Free memory was 102.1 MB in the beginning and 101.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:46:01,709 INFO L168 Benchmark]: Boogie Preprocessor took 54.18 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 100.0 MB in the end (delta: 954.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:46:01,710 INFO L168 Benchmark]: RCFGBuilder took 343.72 ms. Allocated memory is still 125.8 MB. Free memory was 100.0 MB in the beginning and 91.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:46:01,710 INFO L168 Benchmark]: TraceAbstraction took 234465.54 ms. Allocated memory was 125.8 MB in the beginning and 3.0 GB in the end (delta: 2.9 GB). Free memory was 90.5 MB in the beginning and 2.2 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.1 GB. [2021-11-09 10:46:01,711 INFO L168 Benchmark]: Witness Printer took 87.49 ms. Allocated memory is still 3.0 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:46:01,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.08 ms. Allocated memory was 90.2 MB in the beginning and 125.8 MB in the end (delta: 35.7 MB). Free memory was 61.4 MB in the beginning and 102.1 MB in the end (delta: -40.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.46 ms. Allocated memory is still 125.8 MB. Free memory was 102.1 MB in the beginning and 101.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.18 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 100.0 MB in the end (delta: 954.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 343.72 ms. Allocated memory is still 125.8 MB. Free memory was 100.0 MB in the beginning and 91.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 234465.54 ms. Allocated memory was 125.8 MB in the beginning and 3.0 GB in the end (delta: 2.9 GB). Free memory was 90.5 MB in the beginning and 2.2 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.1 GB. * Witness Printer took 87.49 ms. Allocated memory is still 3.0 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 234.3s, OverallIterations: 51, TraceHistogramMax: 102, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 30.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 65.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 987 SDtfs, 1492 SDslu, 20603 SDs, 0 SdLazy, 26193 SolverSat, 2170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10159 GetRequests, 7669 SyntacticMatches, 2 SemanticMatches, 2488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59581 ImplicationChecksByTransitivity, 51.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4186occurred in iteration=50, InterpolantAutomatonStates: 2196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.6s AutomataMinimizationTime, 51 MinimizatonAttempts, 3770 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 1160 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1294097411 FormulaSimplificationTreeSizeReduction, 15.6s HoareSimplificationTime, 3 FomulaSimplificationsInter, 141278450 FormulaSimplificationTreeSizeReductionInter, 49.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 5.6s SatisfiabilityAnalysisTime, 71.8s InterpolantComputationTime, 15850 NumberOfCodeBlocks, 15847 NumberOfCodeBlocksAsserted, 1415 NumberOfCheckSat, 15751 ConstructedInterpolants, 0 QuantifiedInterpolants, 36654 SizeOfPredicates, 2 NumberOfNonLiveVariables, 19531 ConjunctsInSsa, 1941 ConjunctsInUnsatCore, 99 InterpolantComputations, 3 PerfectInterpolantSequences, 343184/532878 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 24 && 24 <= y) && x == 24) || ((x == 20 && y <= 20) && 20 <= y)) || ((9 <= y && x == 9) && y <= 9)) || (((x <= 63 && y <= 37) && 37 <= y) && 63 <= x)) || ((y <= 46 && x == 46) && 46 <= y)) || ((x == 44 && y <= 44) && 44 <= y)) || ((41 == x && 41 <= y) && y <= 41)) || (((y <= 13 && x <= 87) && 13 <= y) && 87 <= x)) || ((y <= 16 && 16 <= y) && x == 16)) || ((y <= 6 && x == 6) && 6 <= y)) || (((56 <= x && x <= 56) && y <= 44) && 44 <= y)) || (((10 <= y && 90 <= x) && x <= 90) && y <= 10)) || (((y <= 22 && 78 <= x) && 22 <= y) && x <= 78)) || ((y <= 42 && 42 <= y) && x == 42)) || (y == 0 && x == 0)) || (((y <= 42 && 42 <= y) && 58 <= x) && x <= 58)) || (((40 <= y && y <= 40) && x <= 60) && 60 <= x)) || ((x == 8 && 8 <= y) && y <= 8)) || ((29 <= y && y <= 29) && x == 29)) || (((x <= 82 && 18 <= y) && y <= 18) && 82 <= x)) || (((96 <= x && x <= 96) && y <= 4) && 4 <= y)) || ((32 <= y && x == 32) && y <= 32)) || ((15 <= y && y <= 15) && x == 15)) || (((35 <= y && y <= 35) && x <= 65) && 65 <= x)) || ((7 <= y && y <= 7) && x == 7)) || ((x == 36 && 36 <= y) && y <= 36)) || ((47 <= y && x == 47) && y <= 47)) || (((y <= 33 && 67 <= x) && 33 <= y) && x <= 67)) || ((y <= 30 && 30 <= y) && x == 30)) || ((y <= 22 && 22 <= y) && x == 22)) || ((x == 35 && 35 <= y) && y <= 35)) || (((y <= 21 && x <= 79) && 21 <= y) && 79 <= x)) || ((x == 5 && 5 <= y) && y <= 5)) || ((x == 26 && 26 <= y) && y <= 26)) || (((61 <= x && y <= 39) && x <= 61) && 39 <= y)) || ((25 <= y && x == 25) && y <= 25)) || ((x == 39 && y <= 39) && 39 <= y)) || (((y <= 16 && 16 <= y) && x <= 84) && 84 <= x)) || (((y <= 14 && 86 <= x) && 14 <= y) && x <= 86)) || ((y <= 37 && x == 37) && 37 <= y)) || ((11 <= y && x == 11) && y <= 11)) || (((38 <= y && x <= 62) && y <= 38) && 62 <= x)) || (((x <= 64 && 64 <= x) && 36 <= y) && y <= 36)) || (((68 <= x && 32 <= y) && x <= 68) && y <= 32)) || (((81 <= x && x <= 81) && 19 <= y) && y <= 19)) || ((2 <= y && y <= 2) && x == 2)) || ((12 <= y && y <= 12) && x == 12)) || (((12 <= y && y <= 12) && 88 <= x) && x <= 88)) || (((54 <= x && y <= 46) && x <= 54) && 46 <= y)) || (((2 <= y && y <= 2) && 98 <= x) && x <= 98)) || ((x == 43 && 43 <= y) && y <= 43)) || (((x <= 55 && y <= 45) && 45 <= y) && 55 <= x)) || (((11 <= y && 89 <= x) && y <= 11) && x <= 89)) || (((47 <= y && x <= 53) && 53 <= x) && y <= 47)) || ((48 <= y && y <= 48) && x == 48)) || ((x == 33 && y <= 33) && 33 <= y)) || (((74 <= x && x <= 74) && 26 <= y) && y <= 26)) || (((28 <= y && x <= 72) && y <= 28) && 72 <= x)) || (((41 <= y && 59 <= x) && y <= 41) && x <= 59)) || (((x <= 92 && 8 <= y) && 92 <= x) && y <= 8)) || ((y <= 45 && x == 45) && 45 <= y)) || ((27 <= y && y <= 27) && x == 27)) || (((70 <= x && x <= 70) && y <= 30) && 30 <= y)) || (((15 <= y && y <= 15) && x <= 85) && 85 <= x)) || ((40 <= y && y <= 40) && 40 == x)) || (((x <= 99 && 99 <= x) && 1 <= y) && y <= 1)) || (((x <= 80 && y <= 20) && 20 <= y) && 80 <= x)) || (((71 <= x && 29 <= y) && y <= 29) && x <= 71)) || ((10 <= y && x == 10) && y <= 10)) || (((48 <= y && 52 <= x) && x <= 52) && y <= 48)) || ((y <= 17 && x == 17) && 17 <= y)) || ((y <= 34 && x == 34) && 34 <= y)) || ((x == 4 && y <= 4) && 4 <= y)) || (((x <= 93 && 7 <= y) && y <= 7) && 93 <= x)) || (((25 <= y && 75 <= x) && y <= 25) && x <= 75)) || ((19 == x && 19 <= y) && y <= 19)) || ((x == 1 && 1 <= y) && y <= 1)) || ((38 <= y && x == 38) && y <= 38)) || ((y <= 14 && 14 <= y) && x == 14)) || (((y <= 6 && 94 <= x) && x <= 94) && 6 <= y)) || ((y <= 21 && 21 <= y) && x == 21)) || ((y <= 49 && 49 <= y) && x == 49)) || ((23 == x && y <= 23) && 23 <= y)) || (((5 <= y && y <= 5) && 95 <= x) && x <= 95)) || (((x <= 69 && y <= 31) && 69 <= x) && 31 <= y)) || (((x <= 91 && 9 <= y) && 91 <= x) && y <= 9)) || ((28 <= y && y <= 28) && x == 28)) || ((x == 3 && y <= 3) && 3 <= y)) || (((y <= 34 && 66 <= x) && x <= 66) && 34 <= y)) || ((y == 0 && 99 < x) && x <= 100)) || (((y <= 24 && 24 <= y) && x <= 76) && 76 <= x)) || (((y <= 23 && 77 <= x) && x <= 77) && 23 <= y)) || (((27 <= y && 73 <= x) && x <= 73) && y <= 27)) || ((18 <= y && y <= 18) && x == 18)) || (((y <= 3 && x <= 97) && 3 <= y) && 97 <= x)) || (((x <= 50 && 50 <= y) && y <= 50) && 50 <= x)) || (((y <= 49 && x <= 51) && 49 <= y) && 51 <= x)) || ((y <= 13 && 13 <= y) && x == 13)) || (((y <= 17 && 17 <= y) && 83 <= x) && x <= 83)) || ((y <= 31 && x == 31) && 31 <= y)) || (((57 <= x && 43 <= y) && y <= 43) && x <= 57) RESULT: Ultimate proved your program to be correct! [2021-11-09 10:46:01,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1892c001-2a3e-4fdb-84ad-c2ec72bf1afc/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE