./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array13_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array13_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:09:31,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:09:31,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:09:31,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:09:31,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:09:31,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:09:31,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:09:31,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:09:31,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:09:31,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:09:31,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:09:31,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:09:31,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:09:31,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:09:31,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:09:31,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:09:31,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:09:31,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:09:31,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:09:31,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:09:31,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:09:31,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:09:31,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:09:31,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:09:31,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:09:31,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:09:31,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:09:31,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:09:31,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:09:31,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:09:31,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:09:31,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:09:31,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:09:31,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:09:31,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:09:31,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:09:31,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:09:31,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:09:31,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:09:31,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:09:31,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:09:31,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:09:31,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:09:31,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:09:31,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:09:31,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:09:31,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:09:31,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:09:31,580 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:09:31,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:09:31,581 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:09:31,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:09:31,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:09:31,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:09:31,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:09:31,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:09:31,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:09:31,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:09:31,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:09:31,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:09:31,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:09:31,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:09:31,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:09:31,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:09:31,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:09:31,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:09:31,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:09:31,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:09:31,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:09:31,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:09:31,589 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:09:31,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:09:31,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:09:31,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:09:31,591 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_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2021-11-07 08:09:31,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:09:31,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:09:31,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:09:31,903 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:09:31,904 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:09:31,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-07 08:09:32,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/data/1be672b7c/a4f94ac389234da8925c02801b268332/FLAG2c45ccd42 [2021-11-07 08:09:32,520 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:09:32,521 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-07 08:09:32,528 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/data/1be672b7c/a4f94ac389234da8925c02801b268332/FLAG2c45ccd42 [2021-11-07 08:09:32,892 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/data/1be672b7c/a4f94ac389234da8925c02801b268332 [2021-11-07 08:09:32,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:09:32,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:09:32,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:09:32,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:09:32,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:09:32,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:09:32" (1/1) ... [2021-11-07 08:09:32,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338b2a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:32, skipping insertion in model container [2021-11-07 08:09:32,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:09:32" (1/1) ... [2021-11-07 08:09:32,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:09:32,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:09:33,098 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_76bacb78-e08d-4856-bf80-c652b4338183/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-07 08:09:33,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:09:33,123 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:09:33,132 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_76bacb78-e08d-4856-bf80-c652b4338183/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-07 08:09:33,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:09:33,157 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:09:33,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33 WrapperNode [2021-11-07 08:09:33,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:09:33,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:09:33,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:09:33,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:09:33,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:09:33,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:09:33,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:09:33,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:09:33,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:09:33,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:09:33,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:09:33,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:09:33,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (1/1) ... [2021-11-07 08:09:33,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:09:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:33,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:09:33,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:09:33,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:09:33,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:09:33,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:09:33,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:09:33,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:09:33,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:09:33,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:09:33,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:09:33,740 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-07 08:09:33,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:33 BoogieIcfgContainer [2021-11-07 08:09:33,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:09:33,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:09:33,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:09:33,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:09:33,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:09:32" (1/3) ... [2021-11-07 08:09:33,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29193ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:33, skipping insertion in model container [2021-11-07 08:09:33,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:33" (2/3) ... [2021-11-07 08:09:33,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29193ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:33, skipping insertion in model container [2021-11-07 08:09:33,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:33" (3/3) ... [2021-11-07 08:09:33,752 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2021-11-07 08:09:33,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:09:33,758 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:09:33,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:09:33,853 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:09:33,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:09:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:09:33,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:33,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:33,913 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash -939636046, now seen corresponding path program 1 times [2021-11-07 08:09:33,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:33,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192255006] [2021-11-07 08:09:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:33,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:34,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:34,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192255006] [2021-11-07 08:09:34,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192255006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:34,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:34,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:09:34,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757517936] [2021-11-07 08:09:34,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:09:34,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:34,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:09:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:09:34,145 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:34,163 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2021-11-07 08:09:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:09:34,164 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 08:09:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:34,173 INFO L225 Difference]: With dead ends: 53 [2021-11-07 08:09:34,173 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 08:09:34,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:09:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 08:09:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 08:09:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-07 08:09:34,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2021-11-07 08:09:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:34,213 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-07 08:09:34,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-07 08:09:34,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:09:34,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:34,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:34,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:09:34,216 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:34,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1418560660, now seen corresponding path program 1 times [2021-11-07 08:09:34,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:34,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136925203] [2021-11-07 08:09:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:34,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:34,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:34,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270469314] [2021-11-07 08:09:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:34,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:34,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:34,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:34,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:09:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:34,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:09:34,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:34,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:34,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136925203] [2021-11-07 08:09:34,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:34,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270469314] [2021-11-07 08:09:34,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270469314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:34,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:34,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:09:34,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494980954] [2021-11-07 08:09:34,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:09:34,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:09:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:34,571 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-11-07 08:09:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:34,689 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2021-11-07 08:09:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:09:34,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) Word has length 17 [2021-11-07 08:09:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:34,692 INFO L225 Difference]: With dead ends: 49 [2021-11-07 08:09:34,692 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 08:09:34,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:09:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 08:09:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-11-07 08:09:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-07 08:09:34,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-11-07 08:09:34,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:34,701 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-07 08:09:34,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2021-11-07 08:09:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-07 08:09:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 08:09:34,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:34,703 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:34,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:34,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:34,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1820112994, now seen corresponding path program 1 times [2021-11-07 08:09:34,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:34,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290051691] [2021-11-07 08:09:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:34,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:34,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:34,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380295579] [2021-11-07 08:09:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:34,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:34,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:34,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:09:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:35,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:09:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:09:35,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:35,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290051691] [2021-11-07 08:09:35,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:35,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380295579] [2021-11-07 08:09:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380295579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:35,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:35,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:35,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18501650] [2021-11-07 08:09:35,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:35,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:35,176 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:35,246 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-11-07 08:09:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:35,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 08:09:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:35,247 INFO L225 Difference]: With dead ends: 51 [2021-11-07 08:09:35,248 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 08:09:35,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 08:09:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-07 08:09:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-07 08:09:35,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 23 [2021-11-07 08:09:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:35,254 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-07 08:09:35,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-07 08:09:35,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:09:35,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:35,256 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:35,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:35,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:35,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash 162122786, now seen corresponding path program 1 times [2021-11-07 08:09:35,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:35,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985378582] [2021-11-07 08:09:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:35,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:35,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:35,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946617664] [2021-11-07 08:09:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:35,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:35,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:35,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:35,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:09:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:09:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:09:36,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:36,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985378582] [2021-11-07 08:09:36,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:36,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946617664] [2021-11-07 08:09:36,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946617664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:36,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:36,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:09:36,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996637173] [2021-11-07 08:09:36,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:09:36,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:36,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:09:36,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:09:36,152 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:36,649 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-11-07 08:09:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:09:36,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 27 [2021-11-07 08:09:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:36,651 INFO L225 Difference]: With dead ends: 85 [2021-11-07 08:09:36,652 INFO L226 Difference]: Without dead ends: 67 [2021-11-07 08:09:36,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:09:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-07 08:09:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 42. [2021-11-07 08:09:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-07 08:09:36,668 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 27 [2021-11-07 08:09:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:36,668 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-07 08:09:36,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-07 08:09:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:09:36,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:36,671 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:36,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 08:09:36,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:36,886 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:36,887 INFO L85 PathProgramCache]: Analyzing trace with hash -424683228, now seen corresponding path program 1 times [2021-11-07 08:09:36,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:36,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367250375] [2021-11-07 08:09:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:36,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:36,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:36,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881277007] [2021-11-07 08:09:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:36,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:36,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:36,903 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:36,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:09:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:37,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:09:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:37,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 08:09:37,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 08:09:37,538 INFO L354 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2021-11-07 08:09:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 109 [2021-11-07 08:09:37,719 INFO L354 Elim1Store]: treesize reduction 47, result has 2.1 percent of original size [2021-11-07 08:09:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 53 [2021-11-07 08:09:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-11-07 08:09:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:38,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:38,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367250375] [2021-11-07 08:09:38,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:38,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881277007] [2021-11-07 08:09:38,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881277007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:38,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:38,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-07 08:09:38,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998214492] [2021-11-07 08:09:38,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:09:38,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:38,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:09:38,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:09:38,077 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:38,428 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-11-07 08:09:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:09:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 27 [2021-11-07 08:09:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:38,433 INFO L225 Difference]: With dead ends: 87 [2021-11-07 08:09:38,433 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 08:09:38,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:09:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 08:09:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-11-07 08:09:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-07 08:09:38,456 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 27 [2021-11-07 08:09:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:38,456 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-07 08:09:38,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-07 08:09:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:09:38,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:38,459 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:38,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:38,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:38,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash 61569286, now seen corresponding path program 2 times [2021-11-07 08:09:38,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:38,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205459181] [2021-11-07 08:09:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:38,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:38,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:38,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775047021] [2021-11-07 08:09:38,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:38,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:38,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:38,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:38,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:09:38,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:09:38,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:09:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:38,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:38,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205459181] [2021-11-07 08:09:38,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:38,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775047021] [2021-11-07 08:09:38,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775047021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:38,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:38,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:09:38,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208131862] [2021-11-07 08:09:38,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:09:38,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:38,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:09:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:09:38,981 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:39,124 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2021-11-07 08:09:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:09:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:09:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:39,127 INFO L225 Difference]: With dead ends: 147 [2021-11-07 08:09:39,127 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 08:09:39,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:09:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 08:09:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-11-07 08:09:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 71 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-11-07 08:09:39,140 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 29 [2021-11-07 08:09:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:39,141 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-11-07 08:09:39,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-11-07 08:09:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:09:39,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:39,143 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:39,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:39,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:39,362 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:39,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1765549764, now seen corresponding path program 2 times [2021-11-07 08:09:39,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:39,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983428904] [2021-11-07 08:09:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:39,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:39,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:39,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286118076] [2021-11-07 08:09:39,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:39,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:39,390 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:39,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:09:39,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:09:39,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:39,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:09:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:39,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:39,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983428904] [2021-11-07 08:09:39,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:39,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286118076] [2021-11-07 08:09:39,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286118076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:39,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:39,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:09:39,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976829446] [2021-11-07 08:09:39,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:09:39,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:39,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:09:39,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:09:39,699 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:39,846 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2021-11-07 08:09:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:09:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:09:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:39,848 INFO L225 Difference]: With dead ends: 88 [2021-11-07 08:09:39,848 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 08:09:39,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:09:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 08:09:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-11-07 08:09:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 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) [2021-11-07 08:09:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-11-07 08:09:39,865 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 29 [2021-11-07 08:09:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:39,867 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-11-07 08:09:39,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-11-07 08:09:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:09:39,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:39,870 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:39,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:40,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:40,094 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:40,095 INFO L85 PathProgramCache]: Analyzing trace with hash 341499558, now seen corresponding path program 3 times [2021-11-07 08:09:40,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:40,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998778505] [2021-11-07 08:09:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:40,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:40,107 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:40,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826461882] [2021-11-07 08:09:40,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:09:40,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:40,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:40,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:40,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:09:40,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 08:09:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:40,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:09:40,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:09:40,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:40,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998778505] [2021-11-07 08:09:40,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:40,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826461882] [2021-11-07 08:09:40,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826461882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:40,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:40,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:09:40,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627146538] [2021-11-07 08:09:40,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:09:40,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:40,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:09:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:09:40,564 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:40,905 INFO L93 Difference]: Finished difference Result 157 states and 180 transitions. [2021-11-07 08:09:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:09:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 31 [2021-11-07 08:09:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:40,907 INFO L225 Difference]: With dead ends: 157 [2021-11-07 08:09:40,907 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 08:09:40,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:09:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 08:09:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 70. [2021-11-07 08:09:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 69 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-11-07 08:09:40,927 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 31 [2021-11-07 08:09:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:40,927 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-11-07 08:09:40,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-11-07 08:09:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:09:40,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:40,929 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:40,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:41,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:41,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:41,143 INFO L85 PathProgramCache]: Analyzing trace with hash -938364120, now seen corresponding path program 3 times [2021-11-07 08:09:41,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:41,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614738285] [2021-11-07 08:09:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:41,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:41,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:41,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942649112] [2021-11-07 08:09:41,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:09:41,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:41,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:41,155 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:41,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:09:41,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 08:09:41,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:41,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:09:41,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:09:41,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:41,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614738285] [2021-11-07 08:09:41,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:41,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942649112] [2021-11-07 08:09:41,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942649112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:41,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:41,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:09:41,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056085174] [2021-11-07 08:09:41,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:09:41,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:09:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:09:41,482 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:41,594 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-11-07 08:09:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:09:41,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 08:09:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:41,595 INFO L225 Difference]: With dead ends: 103 [2021-11-07 08:09:41,595 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 08:09:41,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:09:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 08:09:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 70. [2021-11-07 08:09:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.173913043478261) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-11-07 08:09:41,606 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 31 [2021-11-07 08:09:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:41,606 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-11-07 08:09:41,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-11-07 08:09:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:09:41,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:41,608 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:41,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:41,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:41,834 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:41,834 INFO L85 PathProgramCache]: Analyzing trace with hash 869756769, now seen corresponding path program 4 times [2021-11-07 08:09:41,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:41,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426247584] [2021-11-07 08:09:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:41,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:41,844 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:41,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414990975] [2021-11-07 08:09:41,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:09:41,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:41,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:41,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:09:42,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:09:42,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:42,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:09:42,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:09:42,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:42,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426247584] [2021-11-07 08:09:42,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:42,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414990975] [2021-11-07 08:09:42,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414990975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:42,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:42,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:09:42,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349831416] [2021-11-07 08:09:42,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:09:42,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:42,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:09:42,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:09:42,171 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:42,302 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-11-07 08:09:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:09:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-11-07 08:09:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:42,304 INFO L225 Difference]: With dead ends: 78 [2021-11-07 08:09:42,304 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 08:09:42,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:09:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 08:09:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-07 08:09:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2021-11-07 08:09:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-07 08:09:42,311 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 32 [2021-11-07 08:09:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:42,311 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-07 08:09:42,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-07 08:09:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:09:42,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:42,312 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:42,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:42,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:42,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2016456940, now seen corresponding path program 4 times [2021-11-07 08:09:42,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:42,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642425719] [2021-11-07 08:09:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:42,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:42,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:42,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803122110] [2021-11-07 08:09:42,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:09:42,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:42,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:42,543 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:42,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:09:43,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:09:43,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:43,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 08:09:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:43,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-07 08:09:43,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 08:09:43,409 INFO L354 Elim1Store]: treesize reduction 164, result has 20.8 percent of original size [2021-11-07 08:09:43,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 103 [2021-11-07 08:09:43,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 25 [2021-11-07 08:09:43,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 28 [2021-11-07 08:09:43,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:09:43,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 96 [2021-11-07 08:09:43,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:09:43,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:43,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2021-11-07 08:09:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:09:44,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-07 08:09:44,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:44,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 39 [2021-11-07 08:09:45,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,353 INFO L354 Elim1Store]: treesize reduction 470, result has 13.6 percent of original size [2021-11-07 08:09:45,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 112 treesize of output 152 [2021-11-07 08:09:45,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:45,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-11-07 08:09:47,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:09:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:47,712 INFO L354 Elim1Store]: treesize reduction 211, result has 3.2 percent of original size [2021-11-07 08:09:47,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 116 treesize of output 54 [2021-11-07 08:09:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:47,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:47,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642425719] [2021-11-07 08:09:47,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:47,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803122110] [2021-11-07 08:09:47,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803122110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:47,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:47,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-07 08:09:47,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599220349] [2021-11-07 08:09:47,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:09:47,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:09:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:09:47,968 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:50,289 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2021-11-07 08:09:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:09:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 08:09:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:50,291 INFO L225 Difference]: With dead ends: 134 [2021-11-07 08:09:50,291 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 08:09:50,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:09:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 08:09:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2021-11-07 08:09:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 77 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-11-07 08:09:50,305 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 45 [2021-11-07 08:09:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:50,306 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-11-07 08:09:50,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-11-07 08:09:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:09:50,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:50,307 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:50,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:50,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:09:50,518 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:50,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1797602222, now seen corresponding path program 5 times [2021-11-07 08:09:50,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:50,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735825321] [2021-11-07 08:09:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:50,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:50,531 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:50,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940119094] [2021-11-07 08:09:50,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:09:50,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:50,532 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:50,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:09:51,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 08:09:51,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:51,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 08:09:51,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:51,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-07 08:09:51,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 08:09:51,660 INFO L354 Elim1Store]: treesize reduction 140, result has 20.0 percent of original size [2021-11-07 08:09:51,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 95 [2021-11-07 08:09:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:51,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2021-11-07 08:09:51,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:09:52,056 INFO L354 Elim1Store]: treesize reduction 182, result has 15.3 percent of original size [2021-11-07 08:09:52,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 96 [2021-11-07 08:09:52,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:09:52,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 19 [2021-11-07 08:09:52,327 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-07 08:09:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-07 08:09:52,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 39 [2021-11-07 08:09:53,034 INFO L354 Elim1Store]: treesize reduction 590, result has 23.8 percent of original size [2021-11-07 08:09:53,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 133 treesize of output 253 [2021-11-07 08:09:53,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:53,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:09:53,971 INFO L354 Elim1Store]: treesize reduction 274, result has 0.4 percent of original size [2021-11-07 08:09:53,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 166 treesize of output 87 [2021-11-07 08:09:55,195 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-11-07 08:09:55,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 39 [2021-11-07 08:09:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:09:55,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:55,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735825321] [2021-11-07 08:09:55,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:09:55,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940119094] [2021-11-07 08:09:55,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940119094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:55,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:09:55,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 08:09:55,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789206968] [2021-11-07 08:09:55,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:09:55,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:09:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:09:55,343 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:56,659 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2021-11-07 08:09:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 08:09:56,659 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 08:09:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:56,661 INFO L225 Difference]: With dead ends: 127 [2021-11-07 08:09:56,661 INFO L226 Difference]: Without dead ends: 123 [2021-11-07 08:09:56,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:09:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-07 08:09:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2021-11-07 08:09:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2021-11-07 08:09:56,675 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 45 [2021-11-07 08:09:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:56,676 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2021-11-07 08:09:56,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2021-11-07 08:09:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:09:56,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:56,678 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:56,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-07 08:09:56,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:09:56,914 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash -624610570, now seen corresponding path program 5 times [2021-11-07 08:09:56,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:56,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493207983] [2021-11-07 08:09:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:56,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:56,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:09:56,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464012229] [2021-11-07 08:09:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:09:56,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:56,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:56,925 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:56,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:09:59,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 08:09:59,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:59,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:09:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:10:00,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:00,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493207983] [2021-11-07 08:10:00,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:10:00,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464012229] [2021-11-07 08:10:00,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464012229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:00,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:10:00,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:10:00,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124082416] [2021-11-07 08:10:00,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:10:00,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:10:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:10:00,105 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:00,295 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2021-11-07 08:10:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:10:00,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-11-07 08:10:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:00,299 INFO L225 Difference]: With dead ends: 231 [2021-11-07 08:10:00,299 INFO L226 Difference]: Without dead ends: 155 [2021-11-07 08:10:00,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:10:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-07 08:10:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 115. [2021-11-07 08:10:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 114 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) [2021-11-07 08:10:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2021-11-07 08:10:00,329 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 47 [2021-11-07 08:10:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2021-11-07 08:10:00,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2021-11-07 08:10:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:10:00,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:00,332 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:00,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:00,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:00,542 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:00,542 INFO L85 PathProgramCache]: Analyzing trace with hash -216988362, now seen corresponding path program 6 times [2021-11-07 08:10:00,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:00,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657547445] [2021-11-07 08:10:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:00,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:00,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:10:00,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562791055] [2021-11-07 08:10:00,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:10:00,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:00,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:00,560 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:00,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:10:01,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 08:10:01,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:10:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-07 08:10:01,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:01,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657547445] [2021-11-07 08:10:01,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:10:01,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562791055] [2021-11-07 08:10:01,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562791055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:01,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:10:01,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:10:01,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594133019] [2021-11-07 08:10:01,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:10:01,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:10:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:10:01,301 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:01,512 INFO L93 Difference]: Finished difference Result 226 states and 267 transitions. [2021-11-07 08:10:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:10:01,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 47 [2021-11-07 08:10:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:01,514 INFO L225 Difference]: With dead ends: 226 [2021-11-07 08:10:01,514 INFO L226 Difference]: Without dead ends: 172 [2021-11-07 08:10:01,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:10:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-07 08:10:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 135. [2021-11-07 08:10:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 134 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) [2021-11-07 08:10:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2021-11-07 08:10:01,533 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 47 [2021-11-07 08:10:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:01,533 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2021-11-07 08:10:01,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2021-11-07 08:10:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:10:01,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:01,535 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:01,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:01,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:10:01,758 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:01,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1612484589, now seen corresponding path program 7 times [2021-11-07 08:10:01,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:01,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038097408] [2021-11-07 08:10:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:01,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:01,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:10:01,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507515119] [2021-11-07 08:10:01,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:10:01,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:01,773 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:01,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:10:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:02,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:10:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:10:02,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:02,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038097408] [2021-11-07 08:10:02,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:10:02,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507515119] [2021-11-07 08:10:02,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507515119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:02,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:10:02,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:10:02,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10369008] [2021-11-07 08:10:02,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:10:02,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:10:02,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:10:02,386 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:02,606 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2021-11-07 08:10:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:10:02,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 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 52 [2021-11-07 08:10:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:02,607 INFO L225 Difference]: With dead ends: 177 [2021-11-07 08:10:02,607 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 08:10:02,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:10:02,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 08:10:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-11-07 08:10:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1703703703703703) internal successors, (158), 135 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2021-11-07 08:10:02,624 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 52 [2021-11-07 08:10:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:02,625 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2021-11-07 08:10:02,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2021-11-07 08:10:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:10:02,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:02,626 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:02,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-07 08:10:02,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:02,826 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:02,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:02,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1934176085, now seen corresponding path program 1 times [2021-11-07 08:10:02,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:02,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062619766] [2021-11-07 08:10:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:02,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:02,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:10:02,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69038088] [2021-11-07 08:10:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:02,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:02,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:02,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:10:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:04,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-07 08:10:04,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:04,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 08:10:04,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:10:04,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:04,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:04,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 99 [2021-11-07 08:10:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:04,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 23 [2021-11-07 08:10:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:10:05,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 134 [2021-11-07 08:10:05,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 45 [2021-11-07 08:10:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:10:05,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 163 [2021-11-07 08:10:05,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:10:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:05,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 46 [2021-11-07 08:10:06,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,753 INFO L354 Elim1Store]: treesize reduction 470, result has 13.6 percent of original size [2021-11-07 08:10:06,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 112 treesize of output 152 [2021-11-07 08:10:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:06,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 58 [2021-11-07 08:10:07,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:08,033 INFO L354 Elim1Store]: treesize reduction 311, result has 16.4 percent of original size [2021-11-07 08:10:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 139 [2021-11-07 08:10:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:08,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:08,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 37 [2021-11-07 08:10:09,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:09,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:09,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:09,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:09,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:10,010 INFO L354 Elim1Store]: treesize reduction 156, result has 1.9 percent of original size [2021-11-07 08:10:10,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 51 [2021-11-07 08:10:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:10,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:10,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062619766] [2021-11-07 08:10:10,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:10:10,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69038088] [2021-11-07 08:10:10,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69038088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:10,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:10:10,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-07 08:10:10,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846691657] [2021-11-07 08:10:10,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:10:10,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:10:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:10:10,186 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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) [2021-11-07 08:10:14,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:14,689 INFO L93 Difference]: Finished difference Result 216 states and 243 transitions. [2021-11-07 08:10:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:10:14,689 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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 52 [2021-11-07 08:10:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:14,691 INFO L225 Difference]: With dead ends: 216 [2021-11-07 08:10:14,691 INFO L226 Difference]: Without dead ends: 196 [2021-11-07 08:10:14,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=794, Invalid=5212, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:10:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-07 08:10:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 141. [2021-11-07 08:10:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1714285714285715) internal successors, (164), 140 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 164 transitions. [2021-11-07 08:10:14,710 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 164 transitions. Word has length 52 [2021-11-07 08:10:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:14,711 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 164 transitions. [2021-11-07 08:10:14,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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) [2021-11-07 08:10:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 164 transitions. [2021-11-07 08:10:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:10:14,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:14,712 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:14,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-07 08:10:14,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:10:14,926 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2141936493, now seen corresponding path program 1 times [2021-11-07 08:10:14,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:14,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479243644] [2021-11-07 08:10:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:14,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:14,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:10:14,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024008220] [2021-11-07 08:10:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:14,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:14,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:14,949 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:14,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:10:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 08:10:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:16,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 08:10:16,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-07 08:10:16,708 INFO L354 Elim1Store]: treesize reduction 164, result has 20.8 percent of original size [2021-11-07 08:10:16,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 103 [2021-11-07 08:10:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:16,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 7 [2021-11-07 08:10:17,155 INFO L354 Elim1Store]: treesize reduction 329, result has 18.6 percent of original size [2021-11-07 08:10:17,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 138 [2021-11-07 08:10:17,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-07 08:10:17,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 44 [2021-11-07 08:10:17,432 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-07 08:10:17,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-07 08:10:17,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:17,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 33 [2021-11-07 08:10:18,812 INFO L354 Elim1Store]: treesize reduction 516, result has 12.5 percent of original size [2021-11-07 08:10:18,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 112 treesize of output 152 [2021-11-07 08:10:18,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:10:18,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 46 [2021-11-07 08:10:19,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:19,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479243644] [2021-11-07 08:10:19,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:10:19,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024008220] [2021-11-07 08:10:19,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~index2~0, ULTIMATE.start_main_~index1~0] [2021-11-07 08:10:19,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:19,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-07 08:10:19,399 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-07 08:10:19,399 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-07 08:10:19,406 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:10:19,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:19,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:10:19,613 INFO L731 BasicCegarLoop]: Path program histogram: [7, 5, 1, 1, 1, 1, 1] [2021-11-07 08:10:19,615 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:10:19,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:10:19 BoogieIcfgContainer [2021-11-07 08:10:19,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:10:19,653 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:10:19,653 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:10:19,653 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:10:19,654 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:33" (3/4) ... [2021-11-07 08:10:19,661 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:10:19,661 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:10:19,662 INFO L168 Benchmark]: Toolchain (without parser) took 46765.71 ms. Allocated memory was 107.0 MB in the beginning and 180.4 MB in the end (delta: 73.4 MB). Free memory was 71.9 MB in the beginning and 113.2 MB in the end (delta: -41.3 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:10:19,662 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 107.0 MB. Free memory is still 88.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:10:19,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.22 ms. Allocated memory is still 107.0 MB. Free memory was 71.8 MB in the beginning and 84.1 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 08:10:19,663 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.85 ms. Allocated memory is still 107.0 MB. Free memory was 84.1 MB in the beginning and 82.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:10:19,664 INFO L168 Benchmark]: Boogie Preprocessor took 27.98 ms. Allocated memory is still 107.0 MB. Free memory was 82.0 MB in the beginning and 81.0 MB in the end (delta: 984.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:10:19,665 INFO L168 Benchmark]: RCFGBuilder took 515.24 ms. Allocated memory is still 107.0 MB. Free memory was 81.0 MB in the beginning and 69.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 08:10:19,668 INFO L168 Benchmark]: TraceAbstraction took 45907.74 ms. Allocated memory was 107.0 MB in the beginning and 180.4 MB in the end (delta: 73.4 MB). Free memory was 68.9 MB in the beginning and 113.2 MB in the end (delta: -44.3 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2021-11-07 08:10:19,668 INFO L168 Benchmark]: Witness Printer took 8.35 ms. Allocated memory is still 180.4 MB. Free memory is still 113.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:10:19,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 107.0 MB. Free memory is still 88.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 260.22 ms. Allocated memory is still 107.0 MB. Free memory was 71.8 MB in the beginning and 84.1 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.85 ms. Allocated memory is still 107.0 MB. Free memory was 84.1 MB in the beginning and 82.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.98 ms. Allocated memory is still 107.0 MB. Free memory was 82.0 MB in the beginning and 81.0 MB in the end (delta: 984.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 515.24 ms. Allocated memory is still 107.0 MB. Free memory was 81.0 MB in the beginning and 69.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45907.74 ms. Allocated memory was 107.0 MB in the beginning and 180.4 MB in the end (delta: 73.4 MB). Free memory was 68.9 MB in the beginning and 113.2 MB in the end (delta: -44.3 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. * Witness Printer took 8.35 ms. Allocated memory is still 180.4 MB. Free memory is still 113.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L31] COND FALSE !(!cond) [L44] int array[ARR_SIZE][ARR_SIZE] ; [L46] int row = 0, column = 0, num = -1; [L47] signed long long sum = 0 ; [L48] int temp ; [L49] short index1,index2 ; [L51] row=0 [L51] COND TRUE row index2) ? (num*num*num*num) : array[index1][index2] [L63] array[index1][index2] = (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L66] temp = __VERIFIER_nondet_int() [L67] COND FALSE !(temp == 0) [L55] COND TRUE 1 [L58] index1 = __VERIFIER_nondet_short() [L59] index2 = __VERIFIER_nondet_short() [L31] COND FALSE !(!cond) [L31] COND FALSE !(!cond) [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] EXPR array[index1][index2] [L63] EXPR (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L63] array[index1][index2] = (index1 > index2) ? (num*num*num*num) : array[index1][index2] [L66] temp = __VERIFIER_nondet_int() [L67] COND TRUE temp == 0 [L70] row=0 [L70] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2021-11-07 08:10:22,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:10:22,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:10:22,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:10:22,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:10:22,704 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:10:22,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-07 08:10:22,790 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/data/423fb590e/2707f809998c4e3992dc9a50afd1e1b8/FLAGbf406410e [2021-11-07 08:10:23,296 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:10:23,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-07 08:10:23,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/data/423fb590e/2707f809998c4e3992dc9a50afd1e1b8/FLAGbf406410e [2021-11-07 08:10:23,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/data/423fb590e/2707f809998c4e3992dc9a50afd1e1b8 [2021-11-07 08:10:23,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:10:23,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:10:23,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:10:23,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:10:23,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:10:23,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:23,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@907ebf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23, skipping insertion in model container [2021-11-07 08:10:23,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:23,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:10:23,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:10:23,866 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_76bacb78-e08d-4856-bf80-c652b4338183/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-07 08:10:23,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:10:23,903 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:10:23,937 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_76bacb78-e08d-4856-bf80-c652b4338183/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-07 08:10:23,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:10:23,989 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:10:23,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23 WrapperNode [2021-11-07 08:10:23,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:10:23,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:10:23,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:10:23,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:10:24,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:10:24,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:10:24,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:10:24,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:10:24,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:10:24,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:10:24,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:10:24,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:10:24,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (1/1) ... [2021-11-07 08:10:24,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:10:24,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:24,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:10:24,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:10:24,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 08:10:24,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:10:24,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 08:10:24,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:10:24,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:10:24,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:10:24,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 08:10:25,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:10:25,001 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-07 08:10:25,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:10:25 BoogieIcfgContainer [2021-11-07 08:10:25,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:10:25,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:10:25,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:10:25,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:10:25,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:10:23" (1/3) ... [2021-11-07 08:10:25,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42824871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:10:25, skipping insertion in model container [2021-11-07 08:10:25,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:23" (2/3) ... [2021-11-07 08:10:25,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42824871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:10:25, skipping insertion in model container [2021-11-07 08:10:25,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:10:25" (3/3) ... [2021-11-07 08:10:25,013 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2021-11-07 08:10:25,019 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:10:25,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:10:25,097 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:10:25,105 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:10:25,105 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:10:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:10:25,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:25,129 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:25,130 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash -939636046, now seen corresponding path program 1 times [2021-11-07 08:10:25,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:10:25,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636667680] [2021-11-07 08:10:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:25,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:10:25,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:10:25,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:10:25,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 08:10:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:25,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 08:10:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:25,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:10:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:25,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:10:25,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636667680] [2021-11-07 08:10:25,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636667680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:25,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:25,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:10:25,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263542717] [2021-11-07 08:10:25,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:10:25,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:10:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:10:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:10:25,477 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:25,495 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2021-11-07 08:10:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:10:25,497 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 08:10:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:25,506 INFO L225 Difference]: With dead ends: 53 [2021-11-07 08:10:25,506 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 08:10:25,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:10:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 08:10:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 08:10:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-07 08:10:25,545 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2021-11-07 08:10:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:25,546 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-07 08:10:25,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-07 08:10:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:10:25,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:25,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:25,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:25,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:10:25,762 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1418560660, now seen corresponding path program 1 times [2021-11-07 08:10:25,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:10:25,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559138657] [2021-11-07 08:10:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:25,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:10:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:10:25,766 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:10:25,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 08:10:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:25,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:10:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:26,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:10:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:26,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:10:26,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559138657] [2021-11-07 08:10:26,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559138657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:26,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:26,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 08:10:26,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711614591] [2021-11-07 08:10:26,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:10:26,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:10:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:10:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:10:26,702 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:27,391 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2021-11-07 08:10:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:10:27,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 08:10:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:27,393 INFO L225 Difference]: With dead ends: 49 [2021-11-07 08:10:27,393 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 08:10:27,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:27,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 08:10:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-11-07 08:10:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-07 08:10:27,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-11-07 08:10:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:27,402 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-07 08:10:27,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-07 08:10:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 08:10:27,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:27,403 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:27,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:27,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:10:27,604 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:27,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1820112994, now seen corresponding path program 1 times [2021-11-07 08:10:27,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:10:27,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202916896] [2021-11-07 08:10:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:27,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:10:27,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:10:27,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:10:27,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 08:10:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:10:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:28,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:10:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:28,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:10:28,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202916896] [2021-11-07 08:10:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202916896] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:28,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:28,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 08:10:28,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584010222] [2021-11-07 08:10:28,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:10:28,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:10:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:10:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:10:28,451 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:29,170 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-11-07 08:10:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:10:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 08:10:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:29,180 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:10:29,180 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 08:10:29,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 08:10:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-07 08:10:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-07 08:10:29,189 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 23 [2021-11-07 08:10:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:29,189 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-07 08:10:29,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-07 08:10:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:10:29,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:29,192 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:29,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:29,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:10:29,399 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash 162122786, now seen corresponding path program 1 times [2021-11-07 08:10:29,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:10:29,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440460850] [2021-11-07 08:10:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:29,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:10:29,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:10:29,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:10:29,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 08:10:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:10:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:10:30,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:10:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:10:31,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:10:31,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440460850] [2021-11-07 08:10:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440460850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:10:31,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:31,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-07 08:10:31,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778608792] [2021-11-07 08:10:31,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:10:31,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:10:31,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:10:31,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:10:31,833 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:35,392 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2021-11-07 08:10:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:10:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 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 27 [2021-11-07 08:10:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:35,402 INFO L225 Difference]: With dead ends: 117 [2021-11-07 08:10:35,402 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 08:10:35,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:10:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 08:10:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2021-11-07 08:10:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-07 08:10:35,423 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 27 [2021-11-07 08:10:35,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:35,424 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-07 08:10:35,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-07 08:10:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:10:35,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:35,427 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:35,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:35,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:10:35,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:35,641 INFO L85 PathProgramCache]: Analyzing trace with hash -424683228, now seen corresponding path program 1 times [2021-11-07 08:10:35,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:10:35,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330529203] [2021-11-07 08:10:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:35,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:10:35,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:10:35,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:10:35,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 08:10:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:35,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:10:35,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:36,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 08:10:38,058 INFO L354 Elim1Store]: treesize reduction 65, result has 4.4 percent of original size [2021-11-07 08:10:38,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 44 [2021-11-07 08:10:38,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-07 08:10:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:39,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:18,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-07 08:11:18,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2021-11-07 08:11:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:30,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:30,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330529203] [2021-11-07 08:11:30,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330529203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:30,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:30,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2021-11-07 08:11:30,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277314950] [2021-11-07 08:11:30,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:11:30,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:11:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:11:30,924 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 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) [2021-11-07 08:13:00,852 WARN L207 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-11-07 08:13:17,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:17,286 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2021-11-07 08:13:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:13:17,287 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 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 27 [2021-11-07 08:13:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:17,289 INFO L225 Difference]: With dead ends: 117 [2021-11-07 08:13:17,289 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 08:13:17,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 119.1s TimeCoverageRelationStatistics Valid=952, Invalid=3338, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:13:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 08:13:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2021-11-07 08:13:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2021-11-07 08:13:17,310 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 27 [2021-11-07 08:13:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:17,311 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2021-11-07 08:13:17,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 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) [2021-11-07 08:13:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2021-11-07 08:13:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:13:17,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:17,318 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:17,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:17,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:13:17,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1765549764, now seen corresponding path program 2 times [2021-11-07 08:13:17,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:13:17,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011553890] [2021-11-07 08:13:17,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:13:17,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:13:17,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:13:17,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:13:17,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 08:13:17,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:13:17,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:17,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:13:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:13:18,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:13:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:13:19,042 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:13:19,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011553890] [2021-11-07 08:13:19,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011553890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:13:19,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:19,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-07 08:13:19,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084874000] [2021-11-07 08:13:19,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:13:19,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:13:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:13:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:13:19,045 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:22,352 INFO L93 Difference]: Finished difference Result 156 states and 189 transitions. [2021-11-07 08:13:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:13:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:13:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:22,355 INFO L225 Difference]: With dead ends: 156 [2021-11-07 08:13:22,355 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 08:13:22,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:13:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 08:13:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2021-11-07 08:13:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 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) [2021-11-07 08:13:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-11-07 08:13:22,382 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 29 [2021-11-07 08:13:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:22,383 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-11-07 08:13:22,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-11-07 08:13:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:13:22,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:22,385 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:22,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 08:13:22,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:13:22,602 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:22,603 INFO L85 PathProgramCache]: Analyzing trace with hash 869756769, now seen corresponding path program 2 times [2021-11-07 08:13:22,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:13:22,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259895735] [2021-11-07 08:13:22,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:13:22,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:13:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:13:22,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:13:22,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 08:13:23,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:13:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:13:23,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:13:23,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:13:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:13:24,250 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:13:24,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259895735] [2021-11-07 08:13:24,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259895735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:13:24,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:24,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-07 08:13:24,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101926372] [2021-11-07 08:13:24,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:13:24,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:13:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:13:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:13:24,253 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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) [2021-11-07 08:13:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:26,110 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2021-11-07 08:13:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:13:26,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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 32 [2021-11-07 08:13:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:26,112 INFO L225 Difference]: With dead ends: 136 [2021-11-07 08:13:26,112 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 08:13:26,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:13:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 08:13:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2021-11-07 08:13:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.216867469879518) internal successors, (101), 83 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-11-07 08:13:26,134 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 32 [2021-11-07 08:13:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:26,134 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-11-07 08:13:26,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 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) [2021-11-07 08:13:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-11-07 08:13:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:13:26,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:26,136 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:26,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:26,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:13:26,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash -713562479, now seen corresponding path program 3 times [2021-11-07 08:13:26,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:13:26,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26897093] [2021-11-07 08:13:26,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:13:26,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:13:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:13:26,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:13:26,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 08:13:26,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 08:13:26,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:26,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:13:26,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 08:13:28,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:13:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 08:13:29,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:13:29,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26897093] [2021-11-07 08:13:29,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26897093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:13:29,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:29,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-07 08:13:29,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538791875] [2021-11-07 08:13:29,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:13:29,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:13:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:13:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:13:29,048 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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) [2021-11-07 08:13:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:32,497 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2021-11-07 08:13:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:13:32,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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) Word has length 36 [2021-11-07 08:13:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:32,500 INFO L225 Difference]: With dead ends: 122 [2021-11-07 08:13:32,501 INFO L226 Difference]: Without dead ends: 118 [2021-11-07 08:13:32,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:13:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-07 08:13:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 72. [2021-11-07 08:13:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:32,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2021-11-07 08:13:32,520 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 36 [2021-11-07 08:13:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:32,520 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2021-11-07 08:13:32,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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) [2021-11-07 08:13:32,520 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2021-11-07 08:13:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:13:32,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:32,521 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:32,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:32,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:13:32,725 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1078560850, now seen corresponding path program 3 times [2021-11-07 08:13:32,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:13:32,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746825716] [2021-11-07 08:13:32,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:13:32,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:13:32,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:13:32,727 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:13:32,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 08:13:33,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:13:33,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:33,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:13:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:13:34,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:13:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:13:35,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:13:35,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746825716] [2021-11-07 08:13:35,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746825716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:13:35,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:35,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-07 08:13:35,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698079421] [2021-11-07 08:13:35,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:13:35,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:13:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:13:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:13:35,082 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:37,868 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2021-11-07 08:13:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:13:37,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 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 37 [2021-11-07 08:13:37,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:37,869 INFO L225 Difference]: With dead ends: 109 [2021-11-07 08:13:37,869 INFO L226 Difference]: Without dead ends: 61 [2021-11-07 08:13:37,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=388, Invalid=1018, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:13:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-07 08:13:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2021-11-07 08:13:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2021-11-07 08:13:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-07 08:13:37,881 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 37 [2021-11-07 08:13:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:37,882 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-07 08:13:37,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-07 08:13:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:13:37,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:37,884 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:37,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:38,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:13:38,090 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:38,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2016456940, now seen corresponding path program 4 times [2021-11-07 08:13:38,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:13:38,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575896272] [2021-11-07 08:13:38,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:13:38,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:13:38,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:13:38,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:13:38,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76bacb78-e08d-4856-bf80-c652b4338183/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 08:13:38,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:13:38,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:38,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:13:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:39,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-07 08:13:39,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:39,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-11-07 08:13:40,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:40,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:40,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:40,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:13:40,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-11-07 08:13:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:41,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:41,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:41,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:41,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:41,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:41,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:13:41,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-11-07 08:13:42,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:42,962 INFO L354 Elim1Store]: treesize reduction 269, result has 10.0 percent of original size [2021-11-07 08:13:42,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 75 [2021-11-07 08:13:49,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:13:49,559 INFO L354 Elim1Store]: treesize reduction 130, result has 2.3 percent of original size [2021-11-07 08:13:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 37 [2021-11-07 08:13:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:51,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:20:48,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 357 treesize of output 349 [2021-11-07 08:20:57,449 WARN L207 SmtUtils]: Spent 8.89 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-11-07 08:20:57,450 INFO L354 Elim1Store]: treesize reduction 41, result has 53.4 percent of original size [2021-11-07 08:20:57,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 493130813 treesize of output 487625835