./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sina1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:52:05,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:52:05,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:52:05,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:52:05,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:52:05,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:52:05,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:52:05,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:52:05,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:52:05,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:52:05,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:52:05,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:52:05,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:52:05,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:52:05,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:52:05,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:52:05,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:52:05,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:52:05,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:52:05,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:52:05,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:52:05,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:52:05,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:52:05,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:52:05,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:52:05,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:52:05,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:52:05,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:52:05,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:52:05,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:52:05,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:52:05,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:52:05,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:52:05,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:52:05,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:52:05,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:52:05,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:52:05,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:52:05,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:52:05,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:52:05,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:52:05,176 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:52:05,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:52:05,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:52:05,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:52:05,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:52:05,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:52:05,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:52:05,237 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:52:05,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:52:05,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:52:05,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:52:05,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:52:05,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:52:05,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:52:05,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:52:05,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:52:05,241 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:52:05,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:52:05,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:52:05,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:52:05,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:52:05,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:52:05,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:52:05,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:52:05,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:52:05,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:52:05,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:52:05,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:52:05,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:52:05,244 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:52:05,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:52:05,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:52:05,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:52:05,247 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_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2021-11-09 09:52:05,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:52:05,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:52:05,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:52:05,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:52:05,590 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:52:05,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-fpi/sina1.c [2021-11-09 09:52:05,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data/e7b8d930d/174728c0107e4643a11e930f96b9cb32/FLAG7c4b18322 [2021-11-09 09:52:06,222 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:52:06,223 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/sv-benchmarks/c/array-fpi/sina1.c [2021-11-09 09:52:06,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data/e7b8d930d/174728c0107e4643a11e930f96b9cb32/FLAG7c4b18322 [2021-11-09 09:52:06,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data/e7b8d930d/174728c0107e4643a11e930f96b9cb32 [2021-11-09 09:52:06,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:52:06,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:52:06,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:52:06,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:52:06,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:52:06,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:06,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe836e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06, skipping insertion in model container [2021-11-09 09:52:06,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:06,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:52:06,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:52:06,849 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_8faac76c-f356-4bff-acaa-2ca3c59845f9/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-11-09 09:52:06,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:52:06,897 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:52:06,917 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_8faac76c-f356-4bff-acaa-2ca3c59845f9/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-11-09 09:52:06,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:52:06,965 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:52:06,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06 WrapperNode [2021-11-09 09:52:06,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:52:06,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:52:06,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:52:06,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:52:06,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:06,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:52:07,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:52:07,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:52:07,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:52:07,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:52:07,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:52:07,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:52:07,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:52:07,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:07,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:52:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:07,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:52:07,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:52:07,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:52:07,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:52:07,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:52:07,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:52:07,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:52:07,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:52:07,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:52:07,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:52:07,551 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:52:07,551 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 09:52:07,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:07 BoogieIcfgContainer [2021-11-09 09:52:07,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:52:07,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:52:07,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:52:07,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:52:07,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:52:06" (1/3) ... [2021-11-09 09:52:07,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303ead91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:52:07, skipping insertion in model container [2021-11-09 09:52:07,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06" (2/3) ... [2021-11-09 09:52:07,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303ead91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:52:07, skipping insertion in model container [2021-11-09 09:52:07,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:07" (3/3) ... [2021-11-09 09:52:07,563 INFO L111 eAbstractionObserver]: Analyzing ICFG sina1.c [2021-11-09 09:52:07,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:52:07,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:52:07,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:52:07,645 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:52:07,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:52:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2021-11-09 09:52:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:52:07,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:07,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:07,677 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:07,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-09 09:52:07,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:07,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116134041] [2021-11-09 09:52:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:07,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:07,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:07,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116134041] [2021-11-09 09:52:07,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116134041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:07,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:07,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:52:07,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138813263] [2021-11-09 09:52:07,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:52:07,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:52:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:52:07,973 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:07,989 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-09 09:52:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:52:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 09:52:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:07,998 INFO L225 Difference]: With dead ends: 38 [2021-11-09 09:52:07,999 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 09:52:08,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:52:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 09:52:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-09 09:52:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-09 09:52:08,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-09 09:52:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:08,042 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-09 09:52:08,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-09 09:52:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:52:08,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:08,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:08,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:52:08,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-09 09:52:08,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:08,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754491117] [2021-11-09 09:52:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:08,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:08,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:08,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754491117] [2021-11-09 09:52:08,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754491117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:08,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:08,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:52:08,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277502113] [2021-11-09 09:52:08,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:08,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:08,186 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:08,271 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-09 09:52:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 09:52:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:08,277 INFO L225 Difference]: With dead ends: 37 [2021-11-09 09:52:08,278 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 09:52:08,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 09:52:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-09 09:52:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-09 09:52:08,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-09 09:52:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:08,291 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-09 09:52:08,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-09 09:52:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:52:08,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:08,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:08,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:52:08,316 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:08,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:08,317 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-09 09:52:08,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:08,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501689099] [2021-11-09 09:52:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:08,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:08,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:08,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501689099] [2021-11-09 09:52:08,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501689099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:08,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247033321] [2021-11-09 09:52:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:08,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:08,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:08,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:52:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:52:08,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:09,046 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 11 treesize of output 7 [2021-11-09 09:52:09,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:09,482 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:52:09,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-09 09:52:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:09,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247033321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:09,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:09,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-09 09:52:09,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125050648] [2021-11-09 09:52:09,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:52:09,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:09,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:52:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:52:09,678 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:10,204 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-11-09 09:52:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:52:10,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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 16 [2021-11-09 09:52:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:10,206 INFO L225 Difference]: With dead ends: 42 [2021-11-09 09:52:10,206 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 09:52:10,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:52:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 09:52:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-11-09 09:52:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-11-09 09:52:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-09 09:52:10,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-11-09 09:52:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:10,214 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-09 09:52:10,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-09 09:52:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:52:10,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:10,215 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:10,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:10,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-09 09:52:10,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:10,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2021-11-09 09:52:10,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:10,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96013227] [2021-11-09 09:52:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:10,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:10,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:10,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96013227] [2021-11-09 09:52:10,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96013227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:10,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761782176] [2021-11-09 09:52:10,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:10,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:10,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:10,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:52:10,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:52:10,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:10,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:52:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:10,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761782176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:10,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:10,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 09:52:10,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750734789] [2021-11-09 09:52:10,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:52:10,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:10,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:52:10,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:52:10,867 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:11,035 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-11-09 09:52:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:52:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 09:52:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:11,037 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:52:11,038 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 09:52:11,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:52:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 09:52:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-11-09 09:52:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-09 09:52:11,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2021-11-09 09:52:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:11,054 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-09 09:52:11,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-09 09:52:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:52:11,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:11,056 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:11,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:11,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:11,257 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-11-09 09:52:11,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:11,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186026537] [2021-11-09 09:52:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:11,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:52:11,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:11,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186026537] [2021-11-09 09:52:11,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186026537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:11,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65716576] [2021-11-09 09:52:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:11,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:11,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:11,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:52:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:52:11,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:52:11,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65716576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:11,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:11,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-09 09:52:11,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922929660] [2021-11-09 09:52:11,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:52:11,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:11,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:52:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:52:11,529 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2021-11-09 09:52:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:11,642 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-11-09 09:52:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:52:11,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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 20 [2021-11-09 09:52:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:11,654 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:52:11,656 INFO L226 Difference]: Without dead ends: 37 [2021-11-09 09:52:11,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:52:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-09 09:52:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2021-11-09 09:52:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-09 09:52:11,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-11-09 09:52:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:11,669 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-09 09:52:11,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2021-11-09 09:52:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-09 09:52:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:52:11,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:11,673 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:11,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:11,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:11,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-11-09 09:52:11,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:11,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582327209] [2021-11-09 09:52:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:11,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:12,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:12,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582327209] [2021-11-09 09:52:12,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582327209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:12,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958216553] [2021-11-09 09:52:12,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:52:12,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:12,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:12,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:52:12,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:52:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:52:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:12,461 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 11 treesize of output 7 [2021-11-09 09:52:12,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:12,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:12,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:12,896 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 23 treesize of output 18 [2021-11-09 09:52:13,066 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 09:52:13,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-11-09 09:52:13,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:52:13,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:13,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 09:52:13,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230751522] [2021-11-09 09:52:13,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:52:13,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:52:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:52:13,318 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:13,614 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-11-09 09:52:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:52:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 09:52:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:13,616 INFO L225 Difference]: With dead ends: 46 [2021-11-09 09:52:13,616 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 09:52:13,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:52:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 09:52:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-11-09 09:52:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-09 09:52:13,635 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2021-11-09 09:52:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:13,636 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-09 09:52:13,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-09 09:52:13,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:52:13,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:13,638 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:13,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:13,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:52:13,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 4 times [2021-11-09 09:52:13,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:13,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862293977] [2021-11-09 09:52:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:13,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:13,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:13,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862293977] [2021-11-09 09:52:13,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862293977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:13,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124069273] [2021-11-09 09:52:13,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:52:13,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:13,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:13,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:13,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:52:14,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:52:14,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:14,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:52:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:14,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124069273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:14,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:14,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:52:14,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165570627] [2021-11-09 09:52:14,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:52:14,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:52:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:14,212 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-11-09 09:52:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:14,433 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-11-09 09:52:14,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:52:14,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) Word has length 22 [2021-11-09 09:52:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:14,440 INFO L225 Difference]: With dead ends: 76 [2021-11-09 09:52:14,443 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 09:52:14,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:52:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 09:52:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2021-11-09 09:52:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-09 09:52:14,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2021-11-09 09:52:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:14,466 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-09 09:52:14,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-11-09 09:52:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-09 09:52:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:52:14,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:14,470 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:14,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:14,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:14,690 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 2 times [2021-11-09 09:52:14,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:14,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447455290] [2021-11-09 09:52:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:14,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:15,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:15,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447455290] [2021-11-09 09:52:15,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447455290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:15,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181454101] [2021-11-09 09:52:15,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:15,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:15,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:15,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:52:15,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:52:15,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:15,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:52:15,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:15,319 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 11 treesize of output 7 [2021-11-09 09:52:15,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:15,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:15,674 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 27 treesize of output 22 [2021-11-09 09:52:15,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:15,831 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-09 09:52:15,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 35 [2021-11-09 09:52:16,355 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 09:52:16,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 40 [2021-11-09 09:52:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:16,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181454101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:16,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:16,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-11-09 09:52:16,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056482718] [2021-11-09 09:52:16,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:52:16,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:52:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:52:16,404 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 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) [2021-11-09 09:52:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:19,604 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-11-09 09:52:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:52:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 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 24 [2021-11-09 09:52:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:19,606 INFO L225 Difference]: With dead ends: 52 [2021-11-09 09:52:19,606 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 09:52:19,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:52:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 09:52:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-11-09 09:52:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-09 09:52:19,612 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2021-11-09 09:52:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:19,617 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-09 09:52:19,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 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) [2021-11-09 09:52:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-09 09:52:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:52:19,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:19,619 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:19,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:19,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:19,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 5 times [2021-11-09 09:52:19,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:19,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068844820] [2021-11-09 09:52:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:19,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:20,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:20,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068844820] [2021-11-09 09:52:20,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068844820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:20,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617314727] [2021-11-09 09:52:20,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:52:20,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:20,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:20,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:20,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:52:20,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:52:20,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:20,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:52:20,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:20,561 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 11 treesize of output 7 [2021-11-09 09:52:20,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:20,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:20,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:20,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:52:20,948 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:52:20,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-09 09:52:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:21,089 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:52:21,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-11-09 09:52:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:21,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:21,245 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:52:21,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 44 [2021-11-09 09:52:21,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:52:21,563 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 3 case distinctions, treesize of input 55 treesize of output 35 [2021-11-09 09:52:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:21,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617314727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:21,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:21,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-11-09 09:52:21,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618437850] [2021-11-09 09:52:21,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 09:52:21,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 09:52:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:52:21,619 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2021-11-09 09:52:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:22,836 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-11-09 09:52:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:52:22,837 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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 24 [2021-11-09 09:52:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:22,837 INFO L225 Difference]: With dead ends: 62 [2021-11-09 09:52:22,837 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 09:52:22,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=446, Invalid=2634, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:52:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 09:52:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-09 09:52:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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) [2021-11-09 09:52:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-09 09:52:22,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-11-09 09:52:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:22,844 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-09 09:52:22,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2021-11-09 09:52:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-09 09:52:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:52:22,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:22,845 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:22,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:23,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:23,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:23,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:23,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2132742960, now seen corresponding path program 6 times [2021-11-09 09:52:23,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:23,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631981815] [2021-11-09 09:52:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:23,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:23,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:23,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631981815] [2021-11-09 09:52:23,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631981815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:23,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487392378] [2021-11-09 09:52:23,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:52:23,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:23,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:23,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:23,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:52:23,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:52:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:52:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:23,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487392378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:23,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:23,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 09:52:23,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111820889] [2021-11-09 09:52:23,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:52:23,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:23,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:52:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:52:23,553 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:23,735 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-11-09 09:52:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:52:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 09:52:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:23,737 INFO L225 Difference]: With dead ends: 63 [2021-11-09 09:52:23,737 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 09:52:23,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:52:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 09:52:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 31. [2021-11-09 09:52:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 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) [2021-11-09 09:52:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-09 09:52:23,742 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2021-11-09 09:52:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:23,743 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-09 09:52:23,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-09 09:52:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:52:23,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:23,744 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:23,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 09:52:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:52:23,957 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 7 times [2021-11-09 09:52:23,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:23,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162809670] [2021-11-09 09:52:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:23,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:24,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:24,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162809670] [2021-11-09 09:52:24,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162809670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:24,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840730732] [2021-11-09 09:52:24,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:52:24,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:24,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:24,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:52:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 09:52:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:24,787 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 11 treesize of output 7 [2021-11-09 09:52:24,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:24,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:24,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:25,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:25,168 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:52:25,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-09 09:52:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:25,303 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-09 09:52:25,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 32 [2021-11-09 09:52:25,507 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-09 09:52:25,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 54 [2021-11-09 09:52:26,178 INFO L354 Elim1Store]: treesize reduction 212, result has 14.9 percent of original size [2021-11-09 09:52:26,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 73 [2021-11-09 09:52:29,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:52:29,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:29,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-09 09:52:29,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559948452] [2021-11-09 09:52:29,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:52:29,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:52:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1242, Unknown=4, NotChecked=0, Total=1482 [2021-11-09 09:52:29,982 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-09 09:52:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:30,684 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-11-09 09:52:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:52:30,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 09:52:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:30,685 INFO L225 Difference]: With dead ends: 49 [2021-11-09 09:52:30,685 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 09:52:30,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=432, Invalid=2426, Unknown=4, NotChecked=0, Total=2862 [2021-11-09 09:52:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 09:52:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-11-09 09:52:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-09 09:52:30,693 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2021-11-09 09:52:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:30,693 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-09 09:52:30,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-09 09:52:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-09 09:52:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:52:30,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:30,695 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:30,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:30,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:52:30,921 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:30,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1910230140, now seen corresponding path program 3 times [2021-11-09 09:52:30,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:30,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096701543] [2021-11-09 09:52:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:30,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:31,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:31,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096701543] [2021-11-09 09:52:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096701543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:31,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57537165] [2021-11-09 09:52:31,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:52:31,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:31,749 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:31,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:52:31,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:52:31,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:52:32,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:32,023 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 11 treesize of output 7 [2021-11-09 09:52:32,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:32,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:32,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:32,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:52:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,394 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 27 treesize of output 22 [2021-11-09 09:52:32,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 09:52:32,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 44 [2021-11-09 09:52:32,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:32,945 INFO L354 Elim1Store]: treesize reduction 73, result has 8.8 percent of original size [2021-11-09 09:52:32,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 61 [2021-11-09 09:52:33,693 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-09 09:52:33,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 46 [2021-11-09 09:52:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:33,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57537165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:33,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:33,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-09 09:52:33,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188031090] [2021-11-09 09:52:33,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:52:33,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:52:33,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:52:33,748 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:37,579 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2021-11-09 09:52:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 09:52:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 09:52:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:37,581 INFO L225 Difference]: With dead ends: 107 [2021-11-09 09:52:37,581 INFO L226 Difference]: Without dead ends: 68 [2021-11-09 09:52:37,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1157, Invalid=7963, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 09:52:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-09 09:52:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 42. [2021-11-09 09:52:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2021-11-09 09:52:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-11-09 09:52:37,598 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2021-11-09 09:52:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:37,598 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-11-09 09:52:37,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-11-09 09:52:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:52:37,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:37,602 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:37,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:37,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:52:37,809 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1226631488, now seen corresponding path program 4 times [2021-11-09 09:52:37,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:37,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059371517] [2021-11-09 09:52:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:37,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:38,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:38,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059371517] [2021-11-09 09:52:38,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059371517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:38,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972736084] [2021-11-09 09:52:38,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:52:38,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:38,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:38,753 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:38,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:52:39,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:52:39,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:39,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:52:39,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:39,059 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 11 treesize of output 7 [2021-11-09 09:52:39,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:52:39,083 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 25 treesize of output 13 [2021-11-09 09:52:39,135 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 25 treesize of output 13 [2021-11-09 09:52:39,222 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 25 treesize of output 13 [2021-11-09 09:52:39,309 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 25 treesize of output 13 [2021-11-09 09:52:39,403 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 25 treesize of output 13 [2021-11-09 09:52:39,608 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 27 treesize of output 22 [2021-11-09 09:52:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 09:52:39,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:39,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2021-11-09 09:52:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:40,097 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-11-09 09:52:40,097 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 5 case distinctions, treesize of input 72 treesize of output 66 [2021-11-09 09:52:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:40,467 INFO L354 Elim1Store]: treesize reduction 284, result has 13.9 percent of original size [2021-11-09 09:52:40,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 89 [2021-11-09 09:52:51,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:52:51,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:51,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-09 09:52:51,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763471641] [2021-11-09 09:52:51,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:52:51,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:51,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:52:51,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1800, Unknown=5, NotChecked=0, Total=2070 [2021-11-09 09:52:51,458 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:52,989 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-11-09 09:52:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:52:52,989 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 36 [2021-11-09 09:52:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:52,990 INFO L225 Difference]: With dead ends: 84 [2021-11-09 09:52:52,991 INFO L226 Difference]: Without dead ends: 82 [2021-11-09 09:52:52,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=787, Invalid=5214, Unknown=5, NotChecked=0, Total=6006 [2021-11-09 09:52:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-09 09:52:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 44. [2021-11-09 09:52:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-11-09 09:52:53,001 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2021-11-09 09:52:53,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:53,001 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-11-09 09:52:53,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-11-09 09:52:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:52:53,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:53,002 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:53,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:53,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:52:53,209 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:53,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1307870728, now seen corresponding path program 5 times [2021-11-09 09:52:53,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:53,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266571576] [2021-11-09 09:52:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:53,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:52:53,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:53,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266571576] [2021-11-09 09:52:53,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266571576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:53,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043310839] [2021-11-09 09:52:53,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:52:53,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:53,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:53,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:52:53,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:52:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:52:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:52:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043310839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:53,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:53,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 09:52:53,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111421396] [2021-11-09 09:52:53,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:52:53,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:53,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:52:53,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:52:53,881 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:54,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:54,094 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2021-11-09 09:52:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:52:54,095 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 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 38 [2021-11-09 09:52:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:54,096 INFO L225 Difference]: With dead ends: 85 [2021-11-09 09:52:54,096 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 09:52:54,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:52:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 09:52:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2021-11-09 09:52:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-09 09:52:54,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2021-11-09 09:52:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:54,105 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-09 09:52:54,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-09 09:52:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:52:54,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:54,106 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:54,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:54,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:52:54,321 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 159485182, now seen corresponding path program 6 times [2021-11-09 09:52:54,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:54,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021841920] [2021-11-09 09:52:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:54,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:52:54,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:54,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021841920] [2021-11-09 09:52:54,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021841920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:54,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095544415] [2021-11-09 09:52:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:52:54,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:54,445 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:54,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:52:54,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:52:54,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:52:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:52:55,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095544415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:55,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:55,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:52:55,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355296614] [2021-11-09 09:52:55,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:52:55,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:52:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:52:55,091 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:55,300 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2021-11-09 09:52:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:52:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 38 [2021-11-09 09:52:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:55,301 INFO L225 Difference]: With dead ends: 127 [2021-11-09 09:52:55,301 INFO L226 Difference]: Without dead ends: 113 [2021-11-09 09:52:55,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:52:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-09 09:52:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 72. [2021-11-09 09:52:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-11-09 09:52:55,315 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 38 [2021-11-09 09:52:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:55,315 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-11-09 09:52:55,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-11-09 09:52:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:52:55,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:55,316 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:55,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:55,545 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:55,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash -689612618, now seen corresponding path program 7 times [2021-11-09 09:52:55,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:55,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807947379] [2021-11-09 09:52:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:55,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:56,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:56,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807947379] [2021-11-09 09:52:56,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807947379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:56,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623244773] [2021-11-09 09:52:56,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:52:56,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:56,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:56,374 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:56,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:52:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:52:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:56,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:52:56,814 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 17 treesize of output 9 [2021-11-09 09:52:56,863 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 19 treesize of output 19 [2021-11-09 09:52:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:56,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-09 09:52:57,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2021-11-09 09:52:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2021-11-09 09:52:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:52:57,459 INFO L354 Elim1Store]: treesize reduction 248, result has 15.1 percent of original size [2021-11-09 09:52:57,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 79 [2021-11-09 09:53:05,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:53:05,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:53:05,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-09 09:53:05,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531644302] [2021-11-09 09:53:05,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:53:05,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:53:05,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1253, Unknown=4, NotChecked=0, Total=1406 [2021-11-09 09:53:05,812 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:07,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:07,503 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-11-09 09:53:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 09:53:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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 40 [2021-11-09 09:53:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:07,504 INFO L225 Difference]: With dead ends: 97 [2021-11-09 09:53:07,504 INFO L226 Difference]: Without dead ends: 95 [2021-11-09 09:53:07,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=661, Invalid=4305, Unknown=4, NotChecked=0, Total=4970 [2021-11-09 09:53:07,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-09 09:53:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2021-11-09 09:53:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 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) [2021-11-09 09:53:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-11-09 09:53:07,519 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 40 [2021-11-09 09:53:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:07,520 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-11-09 09:53:07,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-11-09 09:53:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:53:07,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:07,521 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:07,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:07,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:07,725 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:07,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1650650108, now seen corresponding path program 8 times [2021-11-09 09:53:07,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:07,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11384286] [2021-11-09 09:53:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:07,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 9 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:08,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:08,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11384286] [2021-11-09 09:53:08,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11384286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:08,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630001702] [2021-11-09 09:53:08,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:53:08,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:08,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:08,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:09,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:53:09,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:53:09,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:09,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:53:09,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:09,464 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 11 treesize of output 7 [2021-11-09 09:53:09,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:53:09,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:53:09,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:53:09,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:53:09,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:53:10,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:53:10,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,211 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 27 treesize of output 22 [2021-11-09 09:53:10,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-11-09 09:53:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 44 [2021-11-09 09:53:10,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:10,788 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-11-09 09:53:10,788 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 5 case distinctions, treesize of input 78 treesize of output 66 [2021-11-09 09:53:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:11,123 INFO L354 Elim1Store]: treesize reduction 194, result has 16.7 percent of original size [2021-11-09 09:53:11,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 82 treesize of output 85 [2021-11-09 09:53:11,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:11,625 INFO L354 Elim1Store]: treesize reduction 394, result has 12.6 percent of original size [2021-11-09 09:53:11,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 107 treesize of output 109 [2021-11-09 09:53:24,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:53:24,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:53:24,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-09 09:53:24,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106667174] [2021-11-09 09:53:24,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:53:24,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:53:24,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2688, Unknown=8, NotChecked=0, Total=3080 [2021-11-09 09:53:24,254 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:26,276 INFO L93 Difference]: Finished difference Result 157 states and 163 transitions. [2021-11-09 09:53:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 09:53:26,276 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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 40 [2021-11-09 09:53:26,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:26,278 INFO L225 Difference]: With dead ends: 157 [2021-11-09 09:53:26,278 INFO L226 Difference]: Without dead ends: 155 [2021-11-09 09:53:26,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1070, Invalid=7294, Unknown=8, NotChecked=0, Total=8372 [2021-11-09 09:53:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-09 09:53:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 79. [2021-11-09 09:53:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 78 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) [2021-11-09 09:53:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-11-09 09:53:26,296 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 40 [2021-11-09 09:53:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:26,296 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-11-09 09:53:26,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-11-09 09:53:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:53:26,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:26,298 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:26,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:26,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:53:26,520 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash -731839686, now seen corresponding path program 9 times [2021-11-09 09:53:26,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:26,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307552321] [2021-11-09 09:53:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:26,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:53:26,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:26,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307552321] [2021-11-09 09:53:26,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307552321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:26,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404167125] [2021-11-09 09:53:26,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:53:26,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:26,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:26,723 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:26,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:53:27,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 09:53:27,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:27,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:53:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:53:27,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404167125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:27,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:27,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-09 09:53:27,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90543009] [2021-11-09 09:53:27,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:53:27,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:27,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:53:27,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:53:27,536 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:27,930 INFO L93 Difference]: Finished difference Result 181 states and 189 transitions. [2021-11-09 09:53:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:53:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 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 42 [2021-11-09 09:53:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:27,932 INFO L225 Difference]: With dead ends: 181 [2021-11-09 09:53:27,932 INFO L226 Difference]: Without dead ends: 167 [2021-11-09 09:53:27,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:53:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-09 09:53:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2021-11-09 09:53:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 104 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2021-11-09 09:53:27,946 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 42 [2021-11-09 09:53:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:27,946 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2021-11-09 09:53:27,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2021-11-09 09:53:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:53:27,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:27,947 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:27,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:28,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:53:28,161 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash -949375060, now seen corresponding path program 10 times [2021-11-09 09:53:28,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:28,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849108929] [2021-11-09 09:53:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:28,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:28,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:28,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849108929] [2021-11-09 09:53:28,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849108929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:28,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766784708] [2021-11-09 09:53:28,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:53:28,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:28,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:28,921 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:28,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:53:29,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:53:29,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:29,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 09:53:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:29,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:53:29,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:53:29,555 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 25 treesize of output 13 [2021-11-09 09:53:29,641 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 25 treesize of output 13 [2021-11-09 09:53:29,710 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 25 treesize of output 13 [2021-11-09 09:53:29,791 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 25 treesize of output 13 [2021-11-09 09:53:29,872 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 25 treesize of output 13 [2021-11-09 09:53:30,064 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 27 treesize of output 22 [2021-11-09 09:53:30,210 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 09:53:30,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 09:53:30,404 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 09:53:30,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 52 [2021-11-09 09:53:30,581 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-11-09 09:53:30,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 56 [2021-11-09 09:53:30,874 INFO L354 Elim1Store]: treesize reduction 266, result has 13.6 percent of original size [2021-11-09 09:53:30,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 75 [2021-11-09 09:53:33,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:53:33,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:53:33,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-09 09:53:33,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53316386] [2021-11-09 09:53:33,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:53:33,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:53:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1994, Unknown=2, NotChecked=0, Total=2162 [2021-11-09 09:53:33,337 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:34,892 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2021-11-09 09:53:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 09:53:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 09:53:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:34,894 INFO L225 Difference]: With dead ends: 138 [2021-11-09 09:53:34,894 INFO L226 Difference]: Without dead ends: 136 [2021-11-09 09:53:34,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=659, Invalid=5819, Unknown=2, NotChecked=0, Total=6480 [2021-11-09 09:53:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-09 09:53:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-11-09 09:53:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1018518518518519) internal successors, (119), 108 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-11-09 09:53:34,913 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 44 [2021-11-09 09:53:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:34,914 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-11-09 09:53:34,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-11-09 09:53:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:53:34,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:34,915 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:34,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:35,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:35,117 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:35,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1740648434, now seen corresponding path program 11 times [2021-11-09 09:53:35,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:35,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242768354] [2021-11-09 09:53:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:35,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:36,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:36,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242768354] [2021-11-09 09:53:36,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242768354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:36,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803561353] [2021-11-09 09:53:36,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:53:36,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:36,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:36,043 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:36,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:53:36,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 09:53:36,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:36,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:53:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:36,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 09:53:36,737 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 17 treesize of output 9 [2021-11-09 09:53:36,769 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 19 treesize of output 19 [2021-11-09 09:53:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:36,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-09 09:53:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:36,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 49 [2021-11-09 09:53:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 64 [2021-11-09 09:53:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2021-11-09 09:53:37,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:37,590 INFO L354 Elim1Store]: treesize reduction 97, result has 6.7 percent of original size [2021-11-09 09:53:37,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 89 treesize of output 79 [2021-11-09 09:53:38,478 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-09 09:53:38,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 42 [2021-11-09 09:53:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 09:53:38,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803561353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:38,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:38,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21] total 45 [2021-11-09 09:53:38,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825359105] [2021-11-09 09:53:38,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 09:53:38,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 09:53:38,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:53:38,514 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 45 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:41,770 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2021-11-09 09:53:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-09 09:53:41,770 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 45 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 09:53:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:41,771 INFO L225 Difference]: With dead ends: 164 [2021-11-09 09:53:41,772 INFO L226 Difference]: Without dead ends: 143 [2021-11-09 09:53:41,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1369, Invalid=8731, Unknown=0, NotChecked=0, Total=10100 [2021-11-09 09:53:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-09 09:53:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2021-11-09 09:53:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 116 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2021-11-09 09:53:41,816 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 44 [2021-11-09 09:53:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:41,817 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2021-11-09 09:53:41,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 45 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2021-11-09 09:53:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:53:41,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:41,819 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:41,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:42,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:42,037 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash 257864504, now seen corresponding path program 12 times [2021-11-09 09:53:42,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:42,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676676465] [2021-11-09 09:53:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:42,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:43,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:43,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676676465] [2021-11-09 09:53:43,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676676465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:43,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939109369] [2021-11-09 09:53:43,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:53:43,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:43,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:43,212 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:43,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:53:43,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 09:53:43,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 09:53:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:44,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-09 09:53:44,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,155 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 19 treesize of output 19 [2021-11-09 09:53:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-09 09:53:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2021-11-09 09:53:44,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,670 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-11-09 09:53:44,670 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 5 case distinctions, treesize of input 71 treesize of output 63 [2021-11-09 09:53:44,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:44,967 INFO L354 Elim1Store]: treesize reduction 194, result has 16.7 percent of original size [2021-11-09 09:53:44,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 91 treesize of output 82 [2021-11-09 09:53:45,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,359 INFO L354 Elim1Store]: treesize reduction 288, result has 14.8 percent of original size [2021-11-09 09:53:45,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 123 treesize of output 101 [2021-11-09 09:53:45,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:45,841 INFO L354 Elim1Store]: treesize reduction 502, result has 11.9 percent of original size [2021-11-09 09:53:45,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 152 treesize of output 125 [2021-11-09 09:53:55,641 INFO L354 Elim1Store]: treesize reduction 298, result has 0.3 percent of original size [2021-11-09 09:53:55,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 184 treesize of output 80 [2021-11-09 09:53:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-09 09:53:55,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939109369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:55,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:55,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49 [2021-11-09 09:53:55,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342404430] [2021-11-09 09:53:55,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:53:55,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:53:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2016, Unknown=1, NotChecked=0, Total=2352 [2021-11-09 09:53:55,688 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 49 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:39,064 WARN L207 SmtUtils]: Spent 7.55 s on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2021-11-09 09:55:11,450 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-09 09:55:11,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-09 09:55:11,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-09 09:55:11,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:55:11,653 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:886) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 35 more [2021-11-09 09:55:11,656 INFO L168 Benchmark]: Toolchain (without parser) took 185061.97 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 69.5 MB in the beginning and 97.9 MB in the end (delta: -28.4 MB). Peak memory consumption was 96.3 MB. Max. memory is 16.1 GB. [2021-11-09 09:55:11,657 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 109.1 MB. Free memory is still 86.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:55:11,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.16 ms. Allocated memory is still 109.1 MB. Free memory was 69.3 MB in the beginning and 84.1 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 09:55:11,658 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.20 ms. Allocated memory is still 109.1 MB. Free memory was 84.1 MB in the beginning and 82.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:55:11,658 INFO L168 Benchmark]: Boogie Preprocessor took 50.65 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 81.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:55:11,658 INFO L168 Benchmark]: RCFGBuilder took 480.12 ms. Allocated memory is still 109.1 MB. Free memory was 81.3 MB in the beginning and 70.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 09:55:11,659 INFO L168 Benchmark]: TraceAbstraction took 184100.08 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 70.4 MB in the beginning and 97.9 MB in the end (delta: -27.5 MB). Peak memory consumption was 98.9 MB. Max. memory is 16.1 GB. [2021-11-09 09:55:11,661 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 109.1 MB. Free memory is still 86.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 369.16 ms. Allocated memory is still 109.1 MB. Free memory was 69.3 MB in the beginning and 84.1 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.20 ms. Allocated memory is still 109.1 MB. Free memory was 84.1 MB in the beginning and 82.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.65 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 81.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 480.12 ms. Allocated memory is still 109.1 MB. Free memory was 81.3 MB in the beginning and 70.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 184100.08 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 70.4 MB in the beginning and 97.9 MB in the end (delta: -27.5 MB). Peak memory consumption was 98.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sina1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:55:14,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:55:14,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:55:14,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:55:14,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:55:14,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:55:14,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:55:14,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:55:14,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:55:14,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:55:14,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:55:14,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:55:14,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:55:14,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:55:14,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:55:14,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:55:14,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:55:14,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:55:14,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:55:14,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:55:14,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:55:14,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:55:14,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:55:14,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:55:14,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:55:14,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:55:14,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:55:14,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:55:14,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:55:14,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:55:14,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:55:14,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:55:14,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:55:14,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:55:14,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:55:14,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:55:14,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:55:14,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:55:14,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:55:14,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:55:14,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:55:14,614 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-09 09:55:14,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:55:14,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:55:14,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:55:14,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:55:14,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:55:14,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:55:14,651 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:55:14,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:55:14,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:55:14,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:55:14,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:55:14,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:55:14,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:55:14,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:55:14,654 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 09:55:14,655 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 09:55:14,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:55:14,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:55:14,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:55:14,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:55:14,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:55:14,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:55:14,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:55:14,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:55:14,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:55:14,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:55:14,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:55:14,659 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 09:55:14,659 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 09:55:14,659 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:55:14,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:55:14,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:55:14,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:55:14,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 09:55:14,661 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2021-11-09 09:55:15,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:55:15,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:55:15,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:55:15,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:55:15,168 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:55:15,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-fpi/sina1.c [2021-11-09 09:55:15,265 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data/62f70dd62/314a672da0bd459d94490e0039930233/FLAG41de35b99 [2021-11-09 09:55:15,956 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:55:15,961 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/sv-benchmarks/c/array-fpi/sina1.c [2021-11-09 09:55:15,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data/62f70dd62/314a672da0bd459d94490e0039930233/FLAG41de35b99 [2021-11-09 09:55:16,343 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/data/62f70dd62/314a672da0bd459d94490e0039930233 [2021-11-09 09:55:16,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:55:16,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:55:16,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:55:16,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:55:16,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:55:16,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a5dd277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16, skipping insertion in model container [2021-11-09 09:55:16,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:55:16,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:55:16,591 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_8faac76c-f356-4bff-acaa-2ca3c59845f9/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-11-09 09:55:16,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:55:16,641 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:55:16,669 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_8faac76c-f356-4bff-acaa-2ca3c59845f9/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-11-09 09:55:16,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:55:16,724 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:55:16,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16 WrapperNode [2021-11-09 09:55:16,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:55:16,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:55:16,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:55:16,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:55:16,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:55:16,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:55:16,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:55:16,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:55:16,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:55:16,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:55:16,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:55:16,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:55:16,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (1/1) ... [2021-11-09 09:55:16,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:55:16,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:16,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:55:16,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:55:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 09:55:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:55:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:55:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 09:55:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:55:16,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:55:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:55:16,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 09:55:17,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:55:17,444 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 09:55:17,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:55:17 BoogieIcfgContainer [2021-11-09 09:55:17,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:55:17,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:55:17,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:55:17,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:55:17,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:55:16" (1/3) ... [2021-11-09 09:55:17,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267377d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:55:17, skipping insertion in model container [2021-11-09 09:55:17,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:55:16" (2/3) ... [2021-11-09 09:55:17,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267377d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:55:17, skipping insertion in model container [2021-11-09 09:55:17,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:55:17" (3/3) ... [2021-11-09 09:55:17,480 INFO L111 eAbstractionObserver]: Analyzing ICFG sina1.c [2021-11-09 09:55:17,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:55:17,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:55:17,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:55:17,611 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:55:17,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:55:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2021-11-09 09:55:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:55:17,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:17,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:17,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-09 09:55:17,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:55:17,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245316668] [2021-11-09 09:55:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:17,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:55:17,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:55:17,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:55:17,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 09:55:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 09:55:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:17,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:55:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:18,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:55:18,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245316668] [2021-11-09 09:55:18,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245316668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:55:18,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:55:18,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 09:55:18,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073596065] [2021-11-09 09:55:18,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:55:18,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:55:18,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:55:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:55:18,063 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:18,082 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-09 09:55:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:55:18,084 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 09:55:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:18,094 INFO L225 Difference]: With dead ends: 38 [2021-11-09 09:55:18,095 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 09:55:18,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:55:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 09:55:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-09 09:55:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-09 09:55:18,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-09 09:55:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:18,141 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-09 09:55:18,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-09 09:55:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:55:18,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:18,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:18,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:18,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:55:18,365 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-09 09:55:18,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:55:18,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499851057] [2021-11-09 09:55:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:18,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:55:18,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:55:18,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:55:18,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 09:55:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:55:18,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:18,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:55:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:18,935 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:55:18,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499851057] [2021-11-09 09:55:18,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499851057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:55:18,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:55:18,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-09 09:55:18,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748116255] [2021-11-09 09:55:18,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:55:18,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:55:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:55:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:55:18,942 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:19,241 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-09 09:55:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:55:19,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 09:55:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:19,244 INFO L225 Difference]: With dead ends: 37 [2021-11-09 09:55:19,244 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 09:55:19,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:55:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 09:55:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-09 09:55:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-09 09:55:19,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-09 09:55:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:19,254 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-09 09:55:19,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-09 09:55:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:55:19,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:19,256 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:19,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:19,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:55:19,473 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:19,475 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-09 09:55:19,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:55:19,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929126365] [2021-11-09 09:55:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:19,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:55:19,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:55:19,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:55:19,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 09:55:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:55:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:19,792 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 11 treesize of output 7 [2021-11-09 09:55:19,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:55:20,107 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:55:20,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-09 09:55:20,370 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 40 treesize of output 28 [2021-11-09 09:55:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:20,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:55:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:27,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:55:27,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929126365] [2021-11-09 09:55:27,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929126365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:55:27,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:27,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-09 09:55:27,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480652737] [2021-11-09 09:55:27,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:55:27,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:55:27,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:55:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=370, Unknown=3, NotChecked=0, Total=462 [2021-11-09 09:55:27,718 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-11-09 09:55:38,627 WARN L207 SmtUtils]: Spent 7.51 s on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-11-09 09:55:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:51,204 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-11-09 09:55:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:55:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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 16 [2021-11-09 09:55:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:51,207 INFO L225 Difference]: With dead ends: 59 [2021-11-09 09:55:51,207 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 09:55:51,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=432, Invalid=1544, Unknown=4, NotChecked=0, Total=1980 [2021-11-09 09:55:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 09:55:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-11-09 09:55:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-09 09:55:51,225 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 16 [2021-11-09 09:55:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:51,225 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-09 09:55:51,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-11-09 09:55:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-09 09:55:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:55:51,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:51,228 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:51,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:51,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:55:51,446 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:51,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:51,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 2 times [2021-11-09 09:55:51,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:55:51,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683877519] [2021-11-09 09:55:51,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:55:51,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:55:51,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:55:51,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:55:51,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 09:55:51,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:55:51,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:55:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:51,748 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 11 treesize of output 7 [2021-11-09 09:55:51,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:55:51,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:55:52,341 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:55:52,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-09 09:55:52,697 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:55:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-11-09 09:55:53,223 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 09:55:53,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 36 [2021-11-09 09:55:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:53,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:56:05,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:56:05,259 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 1 [2021-11-09 09:56:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:56:05,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:56:05,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683877519] [2021-11-09 09:56:05,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683877519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:56:05,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:56:05,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-11-09 09:56:05,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439770762] [2021-11-09 09:56:05,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:56:05,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:56:05,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:56:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=630, Unknown=5, NotChecked=0, Total=756 [2021-11-09 09:56:05,280 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:57:00,686 WARN L207 SmtUtils]: Spent 55.24 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-11-09 09:57:06,184 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvule c_~N~0 (_ bv536870911 32))) (.cse1 (not (bvslt (_ bv0 32) c_~N~0)))) (and .cse0 (or (= (select (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)) c_ULTIMATE.start_main_~a~0.offset) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)) c_ULTIMATE.start_main_~a~0.offset) c_~N~0) .cse1) (or (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse2 (store (select |c_#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (store .cse2 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse2) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) ULTIMATE.start_main_~a~0.offset))) .cse1) (or (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)) (not .cse0)) (and .cse0 (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)))) (not (bvsle c_~N~0 (_ bv0 32))) (or (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse4 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse3 (store (select |c_#memory_int| ULTIMATE.start_main_~a~0.base) (bvadd .cse4 ULTIMATE.start_main_~a~0.offset) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (store .cse3 (bvadd (_ bv4 32) .cse4 ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse3) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) ULTIMATE.start_main_~a~0.offset))) .cse1))) is different from false [2021-11-09 09:57:12,452 WARN L207 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-11-09 09:57:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:57:24,128 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-11-09 09:57:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 09:57:24,129 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 09:57:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:57:24,130 INFO L225 Difference]: With dead ends: 90 [2021-11-09 09:57:24,130 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 09:57:24,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 84.9s TimeCoverageRelationStatistics Valid=693, Invalid=3727, Unknown=6, NotChecked=130, Total=4556 [2021-11-09 09:57:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 09:57:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2021-11-09 09:57:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-11-09 09:57:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-09 09:57:24,147 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-11-09 09:57:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:57:24,147 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-09 09:57:24,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:57:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-09 09:57:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:57:24,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:57:24,149 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:57:24,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:57:24,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:57:24,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:57:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:57:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 1 times [2021-11-09 09:57:24,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:57:24,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739532220] [2021-11-09 09:57:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:57:24,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:57:24,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:57:24,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:57:24,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 09:57:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:57:24,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:57:24,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:57:24,644 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 11 treesize of output 7 [2021-11-09 09:57:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:57:24,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:57:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:57:25,062 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:57:25,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-09 09:57:25,517 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 40 treesize of output 28 [2021-11-09 09:57:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:57:25,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:57:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:57:26,358 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:57:26,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739532220] [2021-11-09 09:57:26,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739532220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:57:26,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:57:26,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-11-09 09:57:26,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774838917] [2021-11-09 09:57:26,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:57:26,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:57:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:57:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:57:26,361 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:58:08,645 WARN L207 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-11-09 09:58:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:58:31,158 INFO L93 Difference]: Finished difference Result 166 states and 185 transitions. [2021-11-09 09:58:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 09:58:31,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 24 [2021-11-09 09:58:31,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:58:31,161 INFO L225 Difference]: With dead ends: 166 [2021-11-09 09:58:31,162 INFO L226 Difference]: Without dead ends: 151 [2021-11-09 09:58:31,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 56.0s TimeCoverageRelationStatistics Valid=1398, Invalid=4922, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:58:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-09 09:58:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 54. [2021-11-09 09:58:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:58:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-09 09:58:31,188 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 24 [2021-11-09 09:58:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:58:31,188 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-09 09:58:31,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:58:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-09 09:58:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:58:31,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:58:31,191 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:58:31,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:58:31,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:58:31,405 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:58:31,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:58:31,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 3 times [2021-11-09 09:58:31,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:58:31,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919850184] [2021-11-09 09:58:31,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:58:31,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:58:31,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:58:31,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:58:31,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 09:58:31,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:58:31,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:58:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:58:31,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:58:31,859 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 11 treesize of output 7 [2021-11-09 09:58:31,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:58:32,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:58:32,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:58:32,373 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:58:32,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-09 09:58:32,625 INFO L354 Elim1Store]: treesize reduction 88, result has 18.5 percent of original size [2021-11-09 09:58:32,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-11-09 09:58:32,999 INFO L354 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2021-11-09 09:58:33,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 52 [2021-11-09 09:58:33,826 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 09:58:33,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 33 [2021-11-09 09:58:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:58:33,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:58:38,957 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:58:38,957 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 1 [2021-11-09 09:58:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:58:38,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:58:38,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919850184] [2021-11-09 09:58:38,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919850184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:58:38,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:58:38,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-11-09 09:58:38,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132562638] [2021-11-09 09:58:38,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:58:38,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:58:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:58:38,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:58:38,977 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 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) [2021-11-09 09:58:49,376 WARN L207 SmtUtils]: Spent 7.02 s on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2021-11-09 09:59:00,852 WARN L207 SmtUtils]: Spent 9.90 s on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-11-09 09:59:21,659 WARN L207 SmtUtils]: Spent 10.04 s on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2021-11-09 09:59:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:59:35,883 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-11-09 09:59:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 09:59:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 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 24 [2021-11-09 09:59:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:59:35,889 INFO L225 Difference]: With dead ends: 105 [2021-11-09 09:59:35,889 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 09:59:35,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 55.2s TimeCoverageRelationStatistics Valid=815, Invalid=4735, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:59:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 09:59:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2021-11-09 09:59:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:59:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-09 09:59:35,916 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 24 [2021-11-09 09:59:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:59:35,917 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-09 09:59:35,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 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) [2021-11-09 09:59:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-09 09:59:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:59:35,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:59:35,920 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:59:35,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:59:36,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:59:36,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:59:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:59:36,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1407751726, now seen corresponding path program 4 times [2021-11-09 09:59:36,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:59:36,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570795786] [2021-11-09 09:59:36,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:59:36,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:59:36,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:59:36,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:59:36,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 09:59:36,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:59:36,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:59:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:59:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:59:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:59:37,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:59:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:59:38,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:59:38,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570795786] [2021-11-09 09:59:38,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570795786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:59:38,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:59:38,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-11-09 09:59:38,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182813491] [2021-11-09 09:59:38,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:59:38,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:59:38,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:59:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:59:38,233 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) [2021-11-09 09:59:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:59:41,186 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2021-11-09 09:59:41,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:59:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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 24 [2021-11-09 09:59:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:59:41,188 INFO L225 Difference]: With dead ends: 167 [2021-11-09 09:59:41,189 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 09:59:41,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=491, Invalid=1489, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:59:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 09:59:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 92. [2021-11-09 09:59:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 91 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:59:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2021-11-09 09:59:41,220 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 24 [2021-11-09 09:59:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:59:41,220 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2021-11-09 09:59:41,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 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) [2021-11-09 09:59:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2021-11-09 09:59:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:59:41,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:59:41,223 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:59:41,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:59:41,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:59:41,429 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:59:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:59:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1983767408, now seen corresponding path program 5 times [2021-11-09 09:59:41,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:59:41,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515318689] [2021-11-09 09:59:41,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:59:41,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:59:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:59:41,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:59:41,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 09:59:41,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:59:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:59:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:59:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:59:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:59:42,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:59:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:59:44,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:59:44,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515318689] [2021-11-09 09:59:44,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515318689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:59:44,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:59:44,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-11-09 09:59:44,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852937487] [2021-11-09 09:59:44,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:59:44,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:59:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:59:44,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:59:44,164 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:59:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:59:47,642 INFO L93 Difference]: Finished difference Result 187 states and 209 transitions. [2021-11-09 09:59:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:59:47,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 09:59:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:59:47,645 INFO L225 Difference]: With dead ends: 187 [2021-11-09 09:59:47,645 INFO L226 Difference]: Without dead ends: 149 [2021-11-09 09:59:47,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=547, Invalid=2105, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:59:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-09 09:59:47,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-11-09 09:59:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 93 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:59:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-11-09 09:59:47,694 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 26 [2021-11-09 09:59:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:59:47,695 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-11-09 09:59:47,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:59:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-11-09 09:59:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:59:47,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:59:47,701 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:59:47,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:59:47,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:59:47,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:59:47,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:59:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2132742960, now seen corresponding path program 6 times [2021-11-09 09:59:47,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:59:47,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622079208] [2021-11-09 09:59:47,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:59:47,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:59:47,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:59:47,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:59:47,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 09:59:48,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:59:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:59:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:59:48,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:59:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:59:49,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:59:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:59:50,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:59:50,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622079208] [2021-11-09 09:59:50,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622079208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:59:50,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:59:50,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-11-09 09:59:50,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070429539] [2021-11-09 09:59:50,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:59:50,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:59:50,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:59:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:59:50,111 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:59:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:59:52,276 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2021-11-09 09:59:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:59:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 09:59:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:59:52,279 INFO L225 Difference]: With dead ends: 138 [2021-11-09 09:59:52,280 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 09:59:52,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:59:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 09:59:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2021-11-09 09:59:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:59:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2021-11-09 09:59:52,300 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 26 [2021-11-09 09:59:52,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:59:52,300 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2021-11-09 09:59:52,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:59:52,301 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2021-11-09 09:59:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:59:52,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:59:52,307 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:59:52,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:59:52,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:59:52,508 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:59:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:59:52,509 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 7 times [2021-11-09 09:59:52,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:59:52,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308041015] [2021-11-09 09:59:52,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:59:52,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:59:52,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:59:52,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:59:52,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 09:59:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:59:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:59:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:59:53,082 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 11 treesize of output 7 [2021-11-09 09:59:53,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:59:53,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:59:53,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:59:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:59:53,927 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:59:53,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-11-09 09:59:54,262 INFO L354 Elim1Store]: treesize reduction 88, result has 18.5 percent of original size [2021-11-09 09:59:54,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 37 [2021-11-09 09:59:54,673 INFO L354 Elim1Store]: treesize reduction 162, result has 16.5 percent of original size [2021-11-09 09:59:54,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 52 [2021-11-09 09:59:57,612 INFO L354 Elim1Store]: treesize reduction 172, result has 16.1 percent of original size [2021-11-09 09:59:57,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 54 [2021-11-09 09:59:58,284 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 09:59:58,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 36 [2021-11-09 09:59:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:59:58,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:00:25,537 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:00:25,538 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 418 treesize of output 1 [2021-11-09 10:00:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:00:25,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:00:25,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308041015] [2021-11-09 10:00:25,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308041015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:00:25,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:00:25,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2021-11-09 10:00:25,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341266559] [2021-11-09 10:00:25,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 10:00:25,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:00:25,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 10:00:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1595, Unknown=10, NotChecked=0, Total=1892 [2021-11-09 10:00:25,556 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:00:31,097 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse22 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse19 (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) c_~N~0)) (.cse1 (store (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base) (bvadd .cse22 c_ULTIMATE.start_main_~a~0.offset) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (let ((.cse18 (not (bvslt c_ULTIMATE.start_main_~i~0 c_~N~0))) (.cse0 (bvule c_~N~0 (_ bv536870911 32))) (.cse2 (not (bvslt (bvadd (_ bv3 32) c_ULTIMATE.start_main_~i~0) c_~N~0))) (.cse3 (bvslt (bvadd (_ bv4 32) c_ULTIMATE.start_main_~i~0) c_~N~0)) (.cse21 (store .cse1 (bvadd (_ bv4 32) .cse22 c_ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse1) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) (.cse11 (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) c_~N~0)) (.cse20 (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse41 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse40 (bvadd (select .cse41 |c_ULTIMATE.start_main_~#sum~0.offset|) (_ bv1 32)))) (let ((.cse37 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse41 |c_ULTIMATE.start_main_~#sum~0.offset| .cse40)))) (let ((.cse36 (let ((.cse38 (let ((.cse39 (store (select .cse37 ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset .cse40))) (store .cse39 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset) (select (select (store .cse37 ULTIMATE.start_main_~a~0.base .cse39) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse38 (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset) (select (select (store .cse37 ULTIMATE.start_main_~a~0.base .cse38) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse36 (bvadd ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store .cse37 ULTIMATE.start_main_~a~0.base .cse36) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))))) ULTIMATE.start_main_~a~0.offset)))) (.cse10 (not .cse19))) (and .cse0 (= (select .cse1 c_ULTIMATE.start_main_~a~0.offset) c_~N~0) (or .cse2 .cse3 (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse8 (bvadd (select .cse9 |c_ULTIMATE.start_main_~#sum~0.offset|) (_ bv3 32)))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0.offset| .cse8)))) (let ((.cse4 (let ((.cse6 (let ((.cse7 (store (select .cse5 ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset .cse8))) (store .cse7 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset) (select (select (store .cse5 ULTIMATE.start_main_~a~0.base .cse7) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse6 (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset) (select (select (store .cse5 ULTIMATE.start_main_~a~0.base .cse6) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse4 (bvadd ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store .cse5 ULTIMATE.start_main_~a~0.base .cse4) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))))) ULTIMATE.start_main_~a~0.offset))) .cse10) (or .cse11 (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= (select (let ((.cse17 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse16 (bvadd (select .cse17 |c_ULTIMATE.start_main_~#sum~0.offset|) (_ bv2 32)))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0.offset| .cse16)))) (let ((.cse12 (let ((.cse14 (let ((.cse15 (store (select .cse13 ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset .cse16))) (store .cse15 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset) (select (select (store .cse13 ULTIMATE.start_main_~a~0.base .cse15) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse14 (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset) (select (select (store .cse13 ULTIMATE.start_main_~a~0.base .cse14) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse12 (bvadd ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store .cse13 ULTIMATE.start_main_~a~0.base .cse12) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))))) ULTIMATE.start_main_~a~0.offset) c_~N~0)) .cse18 .cse10) (or .cse19 .cse20 .cse18) (or (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)) (not .cse0)) (and .cse0 (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)))) (= c_~N~0 (select (store .cse21 (bvadd (_ bv8 32) .cse22 c_ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse21) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)) c_ULTIMATE.start_main_~a~0.offset)) (or .cse2 (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= (select (let ((.cse28 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|))) (let ((.cse27 (bvadd (select .cse28 |c_ULTIMATE.start_main_~#sum~0.offset|) (_ bv4 32)))) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store .cse28 |c_ULTIMATE.start_main_~#sum~0.offset| .cse27)))) (let ((.cse23 (let ((.cse25 (let ((.cse26 (store (select .cse24 ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset .cse27))) (store .cse26 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset) (select (select (store .cse24 ULTIMATE.start_main_~a~0.base .cse26) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse25 (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset) (select (select (store .cse24 ULTIMATE.start_main_~a~0.base .cse25) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse23 (bvadd ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store .cse24 ULTIMATE.start_main_~a~0.base .cse23) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))))) ULTIMATE.start_main_~a~0.offset) c_~N~0)) .cse3 .cse10) (not (bvsle c_~N~0 (_ bv0 32))) (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse30 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse29 (let ((.cse31 (let ((.cse32 (store (select |c_#memory_int| ULTIMATE.start_main_~a~0.base) (bvadd .cse30 ULTIMATE.start_main_~a~0.offset) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (store .cse32 (bvadd (_ bv4 32) .cse30 ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse32) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse31 (bvadd (_ bv8 32) .cse30 ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse31) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse29 (bvadd .cse30 ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse29) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) ULTIMATE.start_main_~a~0.offset))) (= c_~N~0 (select .cse21 c_ULTIMATE.start_main_~a~0.offset)) (or .cse11 .cse20 .cse10) (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse33 (let ((.cse34 (let ((.cse35 (store (select |c_#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (store .cse35 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse35) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse34 (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse34) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse33 (bvadd ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse33) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) ULTIMATE.start_main_~a~0.offset))))))) is different from false [2021-11-09 10:02:03,880 WARN L207 SmtUtils]: Spent 43.64 s on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-11-09 10:02:21,521 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse16 (bvadd (_ bv4 32) .cse5 c_ULTIMATE.start_main_~a~0.offset)) (.cse2 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse3 (bvadd .cse5 c_ULTIMATE.start_main_~a~0.offset)) (.cse17 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) (let ((.cse1 (store .cse2 .cse3 .cse17)) (.cse7 (bvadd (_ bv8 32) .cse5 c_ULTIMATE.start_main_~a~0.offset)) (.cse8 (store .cse2 .cse16 .cse17))) (let ((.cse0 (bvule c_~N~0 (_ bv536870911 32))) (.cse4 (store .cse8 .cse7 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse8) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) (.cse6 (store .cse1 .cse16 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse1) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (and .cse0 (= (select .cse1 c_ULTIMATE.start_main_~a~0.offset) c_~N~0) (= c_~N~0 (select .cse2 .cse3)) (or (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)) (not .cse0)) (and .cse0 (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)))) (= c_~N~0 (select .cse2 c_ULTIMATE.start_main_~a~0.offset)) (= (select (store .cse4 (bvadd .cse5 c_ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse4) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)) c_ULTIMATE.start_main_~a~0.offset) c_~N~0) (= c_~N~0 (select (store .cse6 .cse7 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse6) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)) c_ULTIMATE.start_main_~a~0.offset)) (= (select .cse4 c_ULTIMATE.start_main_~a~0.offset) c_~N~0) (not (bvsle c_~N~0 (_ bv0 32))) (= c_~N~0 (select .cse8 c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse10 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse9 (let ((.cse11 (let ((.cse12 (store (select |c_#memory_int| ULTIMATE.start_main_~a~0.base) (bvadd .cse10 ULTIMATE.start_main_~a~0.offset) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (store .cse12 (bvadd (_ bv4 32) .cse10 ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse12) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse11 (bvadd (_ bv8 32) .cse10 ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse11) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse9 (bvadd .cse10 ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse9) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) ULTIMATE.start_main_~a~0.offset))) (= c_~N~0 (select .cse6 c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (store (select |c_#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (store .cse15 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse15) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse14 (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse14) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse13 (bvadd ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse13) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) ULTIMATE.start_main_~a~0.offset)))))))) is different from false [2021-11-09 10:02:23,529 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse16 (bvadd (_ bv4 32) .cse5 c_ULTIMATE.start_main_~a~0.offset)) (.cse2 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse3 (bvadd .cse5 c_ULTIMATE.start_main_~a~0.offset)) (.cse17 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) (let ((.cse1 (store .cse2 .cse3 .cse17)) (.cse7 (bvadd (_ bv8 32) .cse5 c_ULTIMATE.start_main_~a~0.offset)) (.cse8 (store .cse2 .cse16 .cse17))) (let ((.cse0 (bvule c_~N~0 (_ bv536870911 32))) (.cse4 (store .cse8 .cse7 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse8) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) (.cse6 (store .cse1 .cse16 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse1) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (and .cse0 (= (select .cse1 c_ULTIMATE.start_main_~a~0.offset) c_~N~0) (= c_~N~0 (select .cse2 .cse3)) (or (and (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)) (not .cse0)) (and .cse0 (= c_ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)))) (= c_~N~0 (select .cse2 c_ULTIMATE.start_main_~a~0.offset)) (= (select (store .cse4 (bvadd .cse5 c_ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse4) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)) c_ULTIMATE.start_main_~a~0.offset) c_~N~0) (= c_~N~0 (select (store .cse6 .cse7 (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base .cse6) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)) c_ULTIMATE.start_main_~a~0.offset)) (= (select .cse4 c_ULTIMATE.start_main_~a~0.offset) c_~N~0) (not (bvsle c_~N~0 (_ bv0 32))) (= c_~N~0 (select .cse8 c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse10 (bvmul c_ULTIMATE.start_main_~i~0 (_ bv4 32)))) (let ((.cse9 (let ((.cse11 (let ((.cse12 (store (select |c_#memory_int| ULTIMATE.start_main_~a~0.base) (bvadd .cse10 ULTIMATE.start_main_~a~0.offset) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (store .cse12 (bvadd (_ bv4 32) .cse10 ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse12) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse11 (bvadd (_ bv8 32) .cse10 ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse11) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse9 (bvadd .cse10 ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse9) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) ULTIMATE.start_main_~a~0.offset))) (= c_~N~0 (select .cse6 c_ULTIMATE.start_main_~a~0.offset)) (forall ((ULTIMATE.start_main_~a~0.offset (_ BitVec 32)) (ULTIMATE.start_main_~a~0.base (_ BitVec 32))) (= c_~N~0 (select (let ((.cse13 (let ((.cse14 (let ((.cse15 (store (select |c_#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|)))) (store .cse15 (bvadd (_ bv4 32) ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse15) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse14 (bvadd (_ bv8 32) ULTIMATE.start_main_~a~0.offset) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse14) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))))) (store .cse13 (bvadd ULTIMATE.start_main_~a~0.offset (_ bv12 32)) (select (select (store |c_#memory_int| ULTIMATE.start_main_~a~0.base .cse13) |c_ULTIMATE.start_main_~#sum~0.base|) |c_ULTIMATE.start_main_~#sum~0.offset|))) ULTIMATE.start_main_~a~0.offset)))))))) is different from true [2021-11-09 10:03:23,214 WARN L207 SmtUtils]: Spent 5.83 s on a formula simplification. DAG size of input: 181 DAG size of output: 60 [2021-11-09 10:04:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:04:41,436 INFO L93 Difference]: Finished difference Result 243 states and 275 transitions. [2021-11-09 10:04:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-09 10:04:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 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) Word has length 28 [2021-11-09 10:04:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:04:41,441 INFO L225 Difference]: With dead ends: 243 [2021-11-09 10:04:41,442 INFO L226 Difference]: Without dead ends: 213 [2021-11-09 10:04:41,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 233.9s TimeCoverageRelationStatistics Valid=1872, Invalid=10771, Unknown=21, NotChecked=446, Total=13110 [2021-11-09 10:04:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-09 10:04:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 123. [2021-11-09 10:04:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 122 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:04:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2021-11-09 10:04:41,484 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 28 [2021-11-09 10:04:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:04:41,484 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2021-11-09 10:04:41,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:04:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2021-11-09 10:04:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:04:41,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:04:41,486 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:04:41,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:04:41,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:04:41,689 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:04:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:04:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 2 times [2021-11-09 10:04:41,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:04:41,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477281406] [2021-11-09 10:04:41,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:04:41,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:04:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:04:41,692 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:04:41,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8faac76c-f356-4bff-acaa-2ca3c59845f9/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 10:04:42,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:04:42,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:04:42,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:04:42,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:04:42,231 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 11 treesize of output 7 [2021-11-09 10:04:42,243 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 11 treesize of output 9 [2021-11-09 10:04:42,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2021-11-09 10:04:42,340 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 17 treesize of output 9 [2021-11-09 10:04:42,418 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 19 treesize of output 19 [2021-11-09 10:04:42,616 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 10:04:42,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2021-11-09 10:04:42,948 INFO L354 Elim1Store]: treesize reduction 110, result has 17.9 percent of original size [2021-11-09 10:04:42,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 43 [2021-11-09 10:04:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:04:44,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:05:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 10:05:11,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:05:11,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477281406] [2021-11-09 10:05:11,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477281406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:05:11,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:05:11,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-11-09 10:05:11,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332100784] [2021-11-09 10:05:11,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:05:11,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:05:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:05:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=641, Unknown=12, NotChecked=0, Total=756 [2021-11-09 10:05:11,400 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:05:27,936 WARN L207 SmtUtils]: Spent 7.05 s on a formula simplification. DAG size of input: 45 DAG size of output: 34