./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m2.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_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/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_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/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_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/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 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:34:22,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:34:22,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:34:22,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:34:22,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:34:22,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:34:22,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:34:22,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:34:22,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:34:22,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:34:22,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:34:22,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:34:22,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:34:22,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:34:22,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:34:22,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:34:22,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:34:22,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:34:22,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:34:22,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:34:22,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:34:22,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:34:22,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:34:22,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:34:22,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:34:22,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:34:22,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:34:22,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:34:22,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:34:22,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:34:22,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:34:22,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:34:22,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:34:22,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:34:22,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:34:22,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:34:22,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:34:22,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:34:22,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:34:22,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:34:22,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:34:22,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:34:22,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:34:22,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:34:22,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:34:22,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:34:22,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:34:22,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:34:22,629 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:34:22,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:34:22,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:34:22,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:34:22,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:34:22,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:34:22,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:34:22,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:34:22,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:34:22,631 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:34:22,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:34:22,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:34:22,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:34:22,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:34:22,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:34:22,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:34:22,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:34:22,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:34:22,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:34:22,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:34:22,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:34:22,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:34:22,635 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:34:22,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:34:22,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:34:22,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:34:22,635 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_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06c952a07d861e134050c8036ebe12899287d1c68b93fe51209b5cc562011a68 [2021-11-09 09:34:22,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:34:23,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:34:23,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:34:23,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:34:23,011 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:34:23,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2021-11-09 09:34:23,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/data/2501441ec/544b6c61313c4bd591dcbc30b4e26227/FLAGa35580862 [2021-11-09 09:34:23,592 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:34:23,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c [2021-11-09 09:34:23,608 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/data/2501441ec/544b6c61313c4bd591dcbc30b4e26227/FLAGa35580862 [2021-11-09 09:34:23,942 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/data/2501441ec/544b6c61313c4bd591dcbc30b4e26227 [2021-11-09 09:34:23,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:34:23,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:34:23,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:34:23,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:34:23,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:34:23,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:34:23" (1/1) ... [2021-11-09 09:34:23,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c5a1d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:23, skipping insertion in model container [2021-11-09 09:34:23,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:34:23" (1/1) ... [2021-11-09 09:34:23,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:34:23,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:34:24,187 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_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c[408,421] [2021-11-09 09:34:24,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:34:24,216 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:34:24,228 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_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/sv-benchmarks/c/array-crafted/zero_sum_const_m2.c[408,421] [2021-11-09 09:34:24,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:34:24,250 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:34:24,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24 WrapperNode [2021-11-09 09:34:24,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:34:24,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:34:24,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:34:24,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:34:24,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:34:24,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:34:24,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:34:24,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:34:24,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:34:24,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:34:24,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:34:24,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:34:24,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (1/1) ... [2021-11-09 09:34:24,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:34:24,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:24,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:34:24,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:34:24,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:34:24,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:34:24,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:34:24,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:34:24,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:34:24,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:34:24,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:34:24,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:34:24,655 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 09:34:24,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:34:24 BoogieIcfgContainer [2021-11-09 09:34:24,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:34:24,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:34:24,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:34:24,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:34:24,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:34:23" (1/3) ... [2021-11-09 09:34:24,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af95f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:34:24, skipping insertion in model container [2021-11-09 09:34:24,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:34:24" (2/3) ... [2021-11-09 09:34:24,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af95f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:34:24, skipping insertion in model container [2021-11-09 09:34:24,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:34:24" (3/3) ... [2021-11-09 09:34:24,666 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2021-11-09 09:34:24,671 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:34:24,672 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:34:24,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:34:24,747 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 09:34:24,748 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:34:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 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 09:34:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:34:24,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:24,804 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:24,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2021-11-09 09:34:24,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:24,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37547658] [2021-11-09 09:34:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:24,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:25,001 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 09:34:25,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:25,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37547658] [2021-11-09 09:34:25,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37547658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:25,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:25,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:34:25,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784005784] [2021-11-09 09:34:25,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:34:25,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:34:25,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:34:25,042 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 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) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:25,060 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-11-09 09:34:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:34:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 09:34:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:25,072 INFO L225 Difference]: With dead ends: 45 [2021-11-09 09:34:25,072 INFO L226 Difference]: Without dead ends: 21 [2021-11-09 09:34:25,075 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 09:34:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-09 09:34:25,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-09 09:34:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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 09:34:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-09 09:34:25,114 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-11-09 09:34:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:25,115 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-09 09:34:25,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-09 09:34:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:34:25,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:25,117 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:25,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:34:25,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:25,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2021-11-09 09:34:25,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:25,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97520645] [2021-11-09 09:34:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:25,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:25,241 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 09:34:25,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:25,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97520645] [2021-11-09 09:34:25,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97520645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:25,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:25,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:34:25,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653775770] [2021-11-09 09:34:25,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:34:25,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:25,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:34:25,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:25,248 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:25,312 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-11-09 09:34:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:34:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 09:34:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:25,315 INFO L225 Difference]: With dead ends: 39 [2021-11-09 09:34:25,316 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 09:34:25,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:34:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 09:34:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-09 09:34:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-09 09:34:25,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-11-09 09:34:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:25,328 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-09 09:34:25,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-09 09:34:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 09:34:25,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:25,330 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:25,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:34:25,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2021-11-09 09:34:25,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:25,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326208282] [2021-11-09 09:34:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:25,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:34:25,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:25,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326208282] [2021-11-09 09:34:25,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326208282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:34:25,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:34:25,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:34:25,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637896034] [2021-11-09 09:34:25,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:34:25,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:34:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:34:25,464 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:25,552 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-09 09:34:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:34:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 09:34:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:25,554 INFO L225 Difference]: With dead ends: 44 [2021-11-09 09:34:25,555 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 09:34:25,555 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 09:34:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 09:34:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-09 09:34:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-09 09:34:25,572 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-11-09 09:34:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:25,573 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-09 09:34:25,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-09 09:34:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:34:25,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:25,575 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:25,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:34:25,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2021-11-09 09:34:25,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:25,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697612229] [2021-11-09 09:34:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:25,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:34:25,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:25,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697612229] [2021-11-09 09:34:25,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697612229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:25,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360612757] [2021-11-09 09:34:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:25,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:25,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:25,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:34:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:25,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:34:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:34:25,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360612757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:25,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:25,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-09 09:34:25,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747961550] [2021-11-09 09:34:25,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:34:25,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:34:25,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:25,927 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 09:34:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:26,011 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-09 09:34:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:34:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 25 [2021-11-09 09:34:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:26,014 INFO L225 Difference]: With dead ends: 49 [2021-11-09 09:34:26,014 INFO L226 Difference]: Without dead ends: 29 [2021-11-09 09:34:26,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:34:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-09 09:34:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-09 09:34:26,022 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 09:34:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-09 09:34:26,028 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-09 09:34:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:26,029 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-09 09:34:26,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 09:34:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-09 09:34:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:34:26,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:26,030 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:26,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:26,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:26,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2021-11-09 09:34:26,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:26,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730217880] [2021-11-09 09:34:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:26,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:34:26,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:26,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730217880] [2021-11-09 09:34:26,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730217880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:26,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035507231] [2021-11-09 09:34:26,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:34:26,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:26,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:26,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:26,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:34:26,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:34:26,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:34:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:34:26,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035507231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:26,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:26,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-09 09:34:26,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444560941] [2021-11-09 09:34:26,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:34:26,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:34:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:34:26,564 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 09:34:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:26,672 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-09 09:34:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:34:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 27 [2021-11-09 09:34:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:26,674 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:34:26,674 INFO L226 Difference]: Without dead ends: 41 [2021-11-09 09:34:26,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:34:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-09 09:34:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-11-09 09:34:26,690 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 09:34:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-09 09:34:26,691 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2021-11-09 09:34:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:26,691 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-09 09:34:26,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 09:34:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-09 09:34:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:34:26,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:26,693 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:26,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 09:34:26,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:26,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2021-11-09 09:34:26,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:26,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766909538] [2021-11-09 09:34:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:26,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:28,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:28,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766909538] [2021-11-09 09:34:28,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766909538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:28,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718655081] [2021-11-09 09:34:28,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:34:28,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:28,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:28,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:34:28,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:34:28,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:34:28,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:31,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:34:31,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:34:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:31,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718655081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:31,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:31,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 49 [2021-11-09 09:34:31,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337622434] [2021-11-09 09:34:31,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:34:31,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:31,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:34:31,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:34:31,657 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 09:34:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:34,420 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-11-09 09:34:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 09:34:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:34:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:34,422 INFO L225 Difference]: With dead ends: 93 [2021-11-09 09:34:34,422 INFO L226 Difference]: Without dead ends: 87 [2021-11-09 09:34:34,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=338, Invalid=4774, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:34:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-09 09:34:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2021-11-09 09:34:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-09 09:34:34,432 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2021-11-09 09:34:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:34,432 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-09 09:34:34,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 09:34:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-09 09:34:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:34:34,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:34,434 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:34,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:34,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:34:34,640 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2021-11-09 09:34:34,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:34,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775812899] [2021-11-09 09:34:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:34,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:34:34,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775812899] [2021-11-09 09:34:34,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775812899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:34,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693922003] [2021-11-09 09:34:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:34:34,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:34,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:34,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:34:34,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:34:34,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:34:34,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:34:35,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693922003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:35,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:35,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:34:35,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101281476] [2021-11-09 09:34:35,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:34:35,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:34:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:34:35,094 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 09:34:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:35,314 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-11-09 09:34:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:34:35,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 37 [2021-11-09 09:34:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:35,316 INFO L225 Difference]: With dead ends: 121 [2021-11-09 09:34:35,316 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 09:34:35,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:34:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 09:34:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-11-09 09:34:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-09 09:34:35,327 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2021-11-09 09:34:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:35,327 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-09 09:34:35,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 09:34:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-09 09:34:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:34:35,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:35,329 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:35,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:35,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 09:34:35,552 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2021-11-09 09:34:35,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:35,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245823063] [2021-11-09 09:34:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:35,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:34:35,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:35,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245823063] [2021-11-09 09:34:35,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245823063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:35,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276380919] [2021-11-09 09:34:35,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:34:35,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:35,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:35,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:34:35,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:34:35,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:35,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:34:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:34:36,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276380919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:36,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:36,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:34:36,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42980028] [2021-11-09 09:34:36,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:34:36,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:34:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:34:36,026 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 09:34:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:36,242 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-11-09 09:34:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:34:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) Word has length 39 [2021-11-09 09:34:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:36,244 INFO L225 Difference]: With dead ends: 66 [2021-11-09 09:34:36,244 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 09:34:36,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:34:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 09:34:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-09 09:34:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-09 09:34:36,251 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2021-11-09 09:34:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:36,252 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-09 09:34:36,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 09:34:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-09 09:34:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:34:36,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:36,254 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:36,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:36,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:36,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2021-11-09 09:34:36,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:36,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606945912] [2021-11-09 09:34:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:36,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:39,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:39,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606945912] [2021-11-09 09:34:39,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606945912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:39,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569629582] [2021-11-09 09:34:39,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:34:39,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:39,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:39,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:39,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:34:39,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 09:34:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:39,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 09:34:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:34:41,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569629582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:41,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:41,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27] total 60 [2021-11-09 09:34:41,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394034036] [2021-11-09 09:34:41,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 09:34:41,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 09:34:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:34:41,257 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 60 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:45,699 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-11-09 09:34:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 09:34:45,699 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:34:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:45,700 INFO L225 Difference]: With dead ends: 80 [2021-11-09 09:34:45,700 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 09:34:45,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=555, Invalid=8565, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 09:34:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 09:34:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-11-09 09:34:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-11-09 09:34:45,713 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2021-11-09 09:34:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:45,713 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-11-09 09:34:45,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-11-09 09:34:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:34:45,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:45,715 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:45,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:45,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:45,936 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2021-11-09 09:34:45,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:45,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865424479] [2021-11-09 09:34:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:45,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 09:34:46,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:46,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865424479] [2021-11-09 09:34:46,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865424479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:46,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216896456] [2021-11-09 09:34:46,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:34:46,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:46,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:46,044 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:46,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:34:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:34:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 09:34:46,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216896456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:46,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:46,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 09:34:46,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479875022] [2021-11-09 09:34:46,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:34:46,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:46,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:34:46,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:34:46,474 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 09:34:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:46,721 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-11-09 09:34:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:34:46,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 47 [2021-11-09 09:34:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:46,723 INFO L225 Difference]: With dead ends: 149 [2021-11-09 09:34:46,723 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 09:34:46,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:34:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 09:34:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2021-11-09 09:34:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 09:34:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-11-09 09:34:46,734 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2021-11-09 09:34:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:46,734 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-11-09 09:34:46,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 09:34:46,735 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-11-09 09:34:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:34:46,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:46,736 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:46,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-09 09:34:46,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:34:46,952 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:46,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2021-11-09 09:34:46,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:46,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153026908] [2021-11-09 09:34:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:46,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-09 09:34:47,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:47,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153026908] [2021-11-09 09:34:47,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153026908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:47,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577985615] [2021-11-09 09:34:47,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:34:47,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:47,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:47,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:47,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:34:47,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:34:47,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:47,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:34:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-09 09:34:47,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577985615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:47,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:47,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 09:34:47,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64366013] [2021-11-09 09:34:47,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:34:47,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:34:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:34:47,487 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 09:34:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:47,779 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-11-09 09:34:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:34:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 49 [2021-11-09 09:34:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:47,780 INFO L225 Difference]: With dead ends: 80 [2021-11-09 09:34:47,780 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 09:34:47,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:34:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 09:34:47,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-11-09 09:34:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-09 09:34:47,792 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-11-09 09:34:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:47,792 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-09 09:34:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 09:34:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-09 09:34:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:34:47,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:47,794 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:47,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:48,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:34:48,000 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:34:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2021-11-09 09:34:48,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:48,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500933126] [2021-11-09 09:34:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:48,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:52,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:52,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500933126] [2021-11-09 09:34:52,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500933126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:52,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441082723] [2021-11-09 09:34:52,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:34:52,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:52,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:52,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:34:52,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:34:52,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:52,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 09:34:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:52,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:35:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:00,310 INFO L354 Elim1Store]: treesize reduction 81, result has 34.1 percent of original size [2021-11-09 09:35:00,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 69 [2021-11-09 09:35:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:35:00,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441082723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:00,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:00,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 42] total 87 [2021-11-09 09:35:00,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348387304] [2021-11-09 09:35:00,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-09 09:35:00,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-09 09:35:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=7006, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 09:35:00,833 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 87 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 09:35:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:11,097 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-11-09 09:35:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:35:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 87 states have internal predecessors, (103), 0 states have call successors, (0), 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 55 [2021-11-09 09:35:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:11,099 INFO L225 Difference]: With dead ends: 96 [2021-11-09 09:35:11,099 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 09:35:11,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1056, Invalid=15200, Unknown=0, NotChecked=0, Total=16256 [2021-11-09 09:35:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 09:35:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-11-09 09:35:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 09:35:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-11-09 09:35:11,115 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2021-11-09 09:35:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:11,116 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-11-09 09:35:11,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 87 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 09:35:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-11-09 09:35:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:35:11,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:11,118 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:11,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:11,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:35:11,328 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2021-11-09 09:35:11,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:11,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014194829] [2021-11-09 09:35:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:11,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 09:35:11,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:11,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014194829] [2021-11-09 09:35:11,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014194829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:11,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449612214] [2021-11-09 09:35:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:35:11,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:11,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:11,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:35:11,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:35:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:35:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 09:35:12,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449612214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:12,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:12,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 09:35:12,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097882733] [2021-11-09 09:35:12,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:35:12,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:35:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:35:12,049 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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 09:35:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:12,333 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2021-11-09 09:35:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:35:12,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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 57 [2021-11-09 09:35:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:12,334 INFO L225 Difference]: With dead ends: 177 [2021-11-09 09:35:12,335 INFO L226 Difference]: Without dead ends: 100 [2021-11-09 09:35:12,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:35:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-09 09:35:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-11-09 09:35:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 09:35:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-11-09 09:35:12,346 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2021-11-09 09:35:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:12,346 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-11-09 09:35:12,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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 09:35:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-11-09 09:35:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 09:35:12,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:12,348 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:12,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:12,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:35:12,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2021-11-09 09:35:12,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:12,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74715300] [2021-11-09 09:35:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:12,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 09:35:12,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:12,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74715300] [2021-11-09 09:35:12,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74715300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:12,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32489503] [2021-11-09 09:35:12,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:35:12,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:12,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:12,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:12,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:35:13,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:35:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:13,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:35:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 09:35:13,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32489503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:13,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:13,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-09 09:35:13,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431665241] [2021-11-09 09:35:13,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:35:13,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:13,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:35:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:35:13,403 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 09:35:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:13,683 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-11-09 09:35:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:35:13,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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) Word has length 59 [2021-11-09 09:35:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:13,684 INFO L225 Difference]: With dead ends: 94 [2021-11-09 09:35:13,684 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 09:35:13,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:35:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 09:35:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-11-09 09:35:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-09 09:35:13,690 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2021-11-09 09:35:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:13,691 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-09 09:35:13,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 09:35:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-09 09:35:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:35:13,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:13,692 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:13,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:13,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:35:13,893 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2021-11-09 09:35:13,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:13,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909673848] [2021-11-09 09:35:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:13,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:18,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:18,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909673848] [2021-11-09 09:35:18,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909673848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:18,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046565334] [2021-11-09 09:35:18,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:35:18,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:18,217 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:18,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:35:18,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 09:35:18,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:18,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-09 09:35:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:18,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:35:18,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:18,797 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 28 treesize of output 27 [2021-11-09 09:35:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:18,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:35:18,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-09 09:35:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:35:19,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:35:19,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:19,305 INFO L354 Elim1Store]: treesize reduction 114, result has 23.5 percent of original size [2021-11-09 09:35:19,305 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 10 case distinctions, treesize of input 50 treesize of output 58 [2021-11-09 09:35:31,050 INFO L354 Elim1Store]: treesize reduction 259, result has 19.3 percent of original size [2021-11-09 09:35:31,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 105 treesize of output 120 [2021-11-09 09:35:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:31,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046565334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:31,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:31,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 59] total 112 [2021-11-09 09:35:31,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440477907] [2021-11-09 09:35:31,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-09 09:35:31,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:31,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-09 09:35:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=11760, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 09:35:31,891 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 112 states, 112 states have (on average 1.125) internal successors, (126), 112 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 09:35:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:51,898 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2021-11-09 09:35:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-09 09:35:51,898 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.125) internal successors, (126), 112 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 09:35:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:51,899 INFO L225 Difference]: With dead ends: 167 [2021-11-09 09:35:51,900 INFO L226 Difference]: Without dead ends: 147 [2021-11-09 09:35:51,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10194 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=2137, Invalid=32645, Unknown=0, NotChecked=0, Total=34782 [2021-11-09 09:35:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-09 09:35:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2021-11-09 09:35:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 09:35:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-11-09 09:35:51,918 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 65 [2021-11-09 09:35:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:51,918 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-11-09 09:35:51,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.125) internal successors, (126), 112 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 09:35:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-11-09 09:35:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:35:51,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:51,921 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:51,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:52,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:52,128 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2021-11-09 09:35:52,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:52,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423930528] [2021-11-09 09:35:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:52,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-09 09:35:52,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:52,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423930528] [2021-11-09 09:35:52,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423930528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:52,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124470876] [2021-11-09 09:35:52,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:35:52,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:52,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:52,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:35:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:53,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:35:53,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-09 09:35:53,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124470876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:53,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:53,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-09 09:35:53,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975977357] [2021-11-09 09:35:53,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:35:53,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:35:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:35:53,429 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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 09:35:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:53,839 INFO L93 Difference]: Finished difference Result 192 states and 207 transitions. [2021-11-09 09:35:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:35:53,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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 67 [2021-11-09 09:35:53,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:53,840 INFO L225 Difference]: With dead ends: 192 [2021-11-09 09:35:53,840 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 09:35:53,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:35:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 09:35:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-11-09 09:35:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 09:35:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-09 09:35:53,852 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2021-11-09 09:35:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:53,853 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-09 09:35:53,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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 09:35:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-09 09:35:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 09:35:53,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:53,854 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:53,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:54,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:35:54,054 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:35:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 14 times [2021-11-09 09:35:54,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:54,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679736031] [2021-11-09 09:35:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:54,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:00,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:00,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679736031] [2021-11-09 09:36:00,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679736031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:00,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168084127] [2021-11-09 09:36:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:00,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:00,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:00,147 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:00,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:36:00,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:00,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:00,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-09 09:36:00,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:01,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 09:36:01,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:36:01,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:36:01,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2021-11-09 09:36:01,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281003343] [2021-11-09 09:36:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 09:36:01,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 09:36:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=4472, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:36:01,378 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:09,598 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2021-11-09 09:36:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-09 09:36:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 09:36:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:09,599 INFO L225 Difference]: With dead ends: 134 [2021-11-09 09:36:09,603 INFO L226 Difference]: Without dead ends: 130 [2021-11-09 09:36:09,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4127 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1244, Invalid=14506, Unknown=0, NotChecked=0, Total=15750 [2021-11-09 09:36:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-09 09:36:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2021-11-09 09:36:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 09:36:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2021-11-09 09:36:09,628 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2021-11-09 09:36:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:09,628 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2021-11-09 09:36:09,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2021-11-09 09:36:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:36:09,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:09,630 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:09,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:09,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:36:09,840 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 15 times [2021-11-09 09:36:09,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:09,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239721480] [2021-11-09 09:36:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:09,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-09 09:36:09,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:09,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239721480] [2021-11-09 09:36:09,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239721480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:09,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231228360] [2021-11-09 09:36:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:09,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:09,999 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:10,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:36:10,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 09:36:10,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:36:10,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-09 09:36:11,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231228360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:11,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:11,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-09 09:36:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991996825] [2021-11-09 09:36:11,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:36:11,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:36:11,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:36:11,148 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:11,497 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2021-11-09 09:36:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:36:11,498 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 09:36:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:11,498 INFO L225 Difference]: With dead ends: 233 [2021-11-09 09:36:11,498 INFO L226 Difference]: Without dead ends: 128 [2021-11-09 09:36:11,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:36:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-09 09:36:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-11-09 09:36:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.063063063063063) internal successors, (118), 111 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 09:36:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2021-11-09 09:36:11,516 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 77 [2021-11-09 09:36:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:11,516 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2021-11-09 09:36:11,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2021-11-09 09:36:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:36:11,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:11,517 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:11,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:11,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:36:11,718 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash -222248596, now seen corresponding path program 16 times [2021-11-09 09:36:11,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:11,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023165320] [2021-11-09 09:36:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:11,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 09:36:11,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:11,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023165320] [2021-11-09 09:36:11,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023165320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:11,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250456304] [2021-11-09 09:36:11,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:36:11,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:11,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:11,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:36:12,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:36:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:36:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-09 09:36:12,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250456304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:12,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:12,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-09 09:36:12,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805662801] [2021-11-09 09:36:12,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:36:12,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:36:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:36:12,877 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 09:36:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:13,308 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2021-11-09 09:36:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:36:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 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 79 [2021-11-09 09:36:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:13,309 INFO L225 Difference]: With dead ends: 122 [2021-11-09 09:36:13,310 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 09:36:13,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:36:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 09:36:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-11-09 09:36:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 09:36:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-11-09 09:36:13,329 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2021-11-09 09:36:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:13,329 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-11-09 09:36:13,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 09:36:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-11-09 09:36:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 09:36:13,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:13,330 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:13,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:13,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:13,548 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1053375342, now seen corresponding path program 17 times [2021-11-09 09:36:13,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:13,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546899163] [2021-11-09 09:36:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:13,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:21,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:21,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546899163] [2021-11-09 09:36:21,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546899163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:21,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050903178] [2021-11-09 09:36:21,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:36:21,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:21,023 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:21,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:36:21,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 09:36:21,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:21,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-09 09:36:21,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:22,458 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 13 treesize of output 9 [2021-11-09 09:36:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:30,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050903178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:30,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:30,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 65] total 138 [2021-11-09 09:36:30,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727241322] [2021-11-09 09:36:30,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2021-11-09 09:36:30,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:30,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-11-09 09:36:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=18190, Unknown=0, NotChecked=0, Total=18906 [2021-11-09 09:36:30,514 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 138 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 138 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 09:36:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:52,244 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2021-11-09 09:36:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-09 09:36:52,244 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 138 states have internal predecessors, (165), 0 states have call successors, (0), 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 85 [2021-11-09 09:36:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:52,245 INFO L225 Difference]: With dead ends: 154 [2021-11-09 09:36:52,245 INFO L226 Difference]: Without dead ends: 150 [2021-11-09 09:36:52,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11771 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=1935, Invalid=42797, Unknown=0, NotChecked=0, Total=44732 [2021-11-09 09:36:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-09 09:36:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2021-11-09 09:36:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 09:36:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2021-11-09 09:36:52,274 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 85 [2021-11-09 09:36:52,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:52,274 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2021-11-09 09:36:52,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 138 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 09:36:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2021-11-09 09:36:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:36:52,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:52,276 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:52,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:52,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:52,504 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1371812404, now seen corresponding path program 18 times [2021-11-09 09:36:52,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:52,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277510583] [2021-11-09 09:36:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:52,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-09 09:36:52,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:52,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277510583] [2021-11-09 09:36:52,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277510583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:52,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219610870] [2021-11-09 09:36:52,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:36:52,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:52,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:52,733 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:52,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:36:53,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 09:36:53,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:53,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:53,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-09 09:36:54,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219610870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:54,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:54,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-11-09 09:36:54,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259767254] [2021-11-09 09:36:54,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:36:54,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:36:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:36:54,336 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:54,746 INFO L93 Difference]: Finished difference Result 261 states and 276 transitions. [2021-11-09 09:36:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:36:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-09 09:36:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:54,747 INFO L225 Difference]: With dead ends: 261 [2021-11-09 09:36:54,748 INFO L226 Difference]: Without dead ends: 142 [2021-11-09 09:36:54,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:36:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-09 09:36:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 126. [2021-11-09 09:36:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.056) internal successors, (132), 125 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-11-09 09:36:54,809 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 87 [2021-11-09 09:36:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:54,809 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-11-09 09:36:54,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-11-09 09:36:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 09:36:54,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:54,810 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:54,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:55,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:55,010 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1135498646, now seen corresponding path program 19 times [2021-11-09 09:36:55,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:55,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221379960] [2021-11-09 09:36:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:55,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 09:36:55,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:55,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221379960] [2021-11-09 09:36:55,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221379960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:55,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078665746] [2021-11-09 09:36:55,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:36:55,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:55,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:55,220 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:55,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:36:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:56,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 09:36:56,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078665746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:56,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:56,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-11-09 09:36:56,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716971099] [2021-11-09 09:36:56,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:36:56,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:36:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:36:56,526 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:57,089 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2021-11-09 09:36:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:36:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 09:36:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:57,092 INFO L225 Difference]: With dead ends: 136 [2021-11-09 09:36:57,092 INFO L226 Difference]: Without dead ends: 100 [2021-11-09 09:36:57,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:36:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-09 09:36:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-11-09 09:36:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 09:36:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-09 09:36:57,130 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2021-11-09 09:36:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:57,130 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-09 09:36:57,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-09 09:36:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-09 09:36:57,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:57,131 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:57,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-09 09:36:57,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 09:36:57,331 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:57,332 INFO L85 PathProgramCache]: Analyzing trace with hash 238506300, now seen corresponding path program 20 times [2021-11-09 09:36:57,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:57,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139851801] [2021-11-09 09:36:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:57,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 36 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:08,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:08,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139851801] [2021-11-09 09:37:08,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139851801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:08,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767476765] [2021-11-09 09:37:08,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:37:08,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:08,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:08,673 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:08,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:37:09,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:37:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:09,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 151 conjunts are in the unsatisfiable core [2021-11-09 09:37:09,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 319 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:37:21,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767476765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:21,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:21,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 72] total 155 [2021-11-09 09:37:21,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022483068] [2021-11-09 09:37:21,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-11-09 09:37:21,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-11-09 09:37:21,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1059, Invalid=22811, Unknown=0, NotChecked=0, Total=23870 [2021-11-09 09:37:21,690 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 155 states, 155 states have (on average 1.1806451612903226) internal successors, (183), 155 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 09:37:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:45,537 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2021-11-09 09:37:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-09 09:37:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.1806451612903226) internal successors, (183), 155 states have internal predecessors, (183), 0 states have call successors, (0), 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 95 [2021-11-09 09:37:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:45,539 INFO L225 Difference]: With dead ends: 169 [2021-11-09 09:37:45,539 INFO L226 Difference]: Without dead ends: 165 [2021-11-09 09:37:45,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16206 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=2449, Invalid=50681, Unknown=0, NotChecked=0, Total=53130 [2021-11-09 09:37:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-09 09:37:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 137. [2021-11-09 09:37:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 09:37:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2021-11-09 09:37:45,565 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 95 [2021-11-09 09:37:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:45,565 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2021-11-09 09:37:45,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.1806451612903226) internal successors, (183), 155 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 09:37:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2021-11-09 09:37:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:37:45,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:45,566 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:45,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:45,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:45,767 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:45,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1624521822, now seen corresponding path program 21 times [2021-11-09 09:37:45,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:45,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063883691] [2021-11-09 09:37:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:45,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-09 09:37:46,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:46,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063883691] [2021-11-09 09:37:46,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063883691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:46,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190400749] [2021-11-09 09:37:46,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:37:46,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:46,012 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:46,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:37:47,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 09:37:47,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:47,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:47,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-09 09:37:47,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190400749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:47,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:47,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-11-09 09:37:47,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134183197] [2021-11-09 09:37:47,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:37:47,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:37:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:37:47,623 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand has 31 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 09:37:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:48,157 INFO L93 Difference]: Finished difference Result 289 states and 304 transitions. [2021-11-09 09:37:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:37:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 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 97 [2021-11-09 09:37:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:48,159 INFO L225 Difference]: With dead ends: 289 [2021-11-09 09:37:48,159 INFO L226 Difference]: Without dead ends: 156 [2021-11-09 09:37:48,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:37:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-09 09:37:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2021-11-09 09:37:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 139 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 146 transitions. [2021-11-09 09:37:48,192 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 146 transitions. Word has length 97 [2021-11-09 09:37:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:48,193 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 146 transitions. [2021-11-09 09:37:48,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 31 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 09:37:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 146 transitions. [2021-11-09 09:37:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 09:37:48,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:48,194 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:48,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:48,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:48,408 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash 55934272, now seen corresponding path program 22 times [2021-11-09 09:37:48,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:48,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559061634] [2021-11-09 09:37:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:48,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-09 09:37:48,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:48,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559061634] [2021-11-09 09:37:48,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559061634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:48,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469740281] [2021-11-09 09:37:48,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:37:48,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:48,651 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:48,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:37:49,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:37:49,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:49,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:37:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-09 09:37:50,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469740281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:50,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:50,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-11-09 09:37:50,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823821262] [2021-11-09 09:37:50,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:37:50,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:37:50,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:37:50,226 INFO L87 Difference]: Start difference. First operand 140 states and 146 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 09:37:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:50,754 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2021-11-09 09:37:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:37:50,754 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 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 99 [2021-11-09 09:37:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:50,755 INFO L225 Difference]: With dead ends: 150 [2021-11-09 09:37:50,755 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 09:37:50,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=527, Invalid=1825, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:37:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 09:37:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-11-09 09:37:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 09:37:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-11-09 09:37:50,781 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2021-11-09 09:37:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:50,781 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-11-09 09:37:50,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 09:37:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-11-09 09:37:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-09 09:37:50,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:50,783 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:50,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:50,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:37:50,983 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1992502938, now seen corresponding path program 23 times [2021-11-09 09:37:50,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:50,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872896204] [2021-11-09 09:37:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:50,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 25 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:04,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:04,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872896204] [2021-11-09 09:38:04,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872896204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:04,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977341996] [2021-11-09 09:38:04,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:38:04,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:04,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:04,136 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:04,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:38:05,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-09 09:38:05,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:05,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 170 conjunts are in the unsatisfiable core [2021-11-09 09:38:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 09:38:06,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:38:06,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:38:06,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2021-11-09 09:38:06,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855320031] [2021-11-09 09:38:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-09 09:38:06,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-09 09:38:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=9919, Unknown=0, NotChecked=0, Total=10712 [2021-11-09 09:38:06,924 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 96 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:21,292 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2021-11-09 09:38:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-09 09:38:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-09 09:38:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:21,295 INFO L225 Difference]: With dead ends: 183 [2021-11-09 09:38:21,295 INFO L226 Difference]: Without dead ends: 179 [2021-11-09 09:38:21,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7572 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=1447, Invalid=22733, Unknown=0, NotChecked=0, Total=24180 [2021-11-09 09:38:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-09 09:38:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-11-09 09:38:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0533333333333332) internal successors, (158), 150 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2021-11-09 09:38:21,339 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 105 [2021-11-09 09:38:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:21,340 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2021-11-09 09:38:21,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2021-11-09 09:38:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 09:38:21,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:21,342 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:21,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 09:38:21,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:38:21,543 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash 813324808, now seen corresponding path program 24 times [2021-11-09 09:38:21,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:21,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287624618] [2021-11-09 09:38:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:21,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-09 09:38:21,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:21,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287624618] [2021-11-09 09:38:21,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287624618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:21,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594374704] [2021-11-09 09:38:21,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:38:21,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:21,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:21,889 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:21,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:38:23,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 09:38:23,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:38:23,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-09 09:38:23,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594374704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:23,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:23,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-11-09 09:38:23,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644124502] [2021-11-09 09:38:23,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:38:23,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:38:23,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:38:23,960 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:24,684 INFO L93 Difference]: Finished difference Result 317 states and 332 transitions. [2021-11-09 09:38:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:38:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-09 09:38:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:24,686 INFO L225 Difference]: With dead ends: 317 [2021-11-09 09:38:24,686 INFO L226 Difference]: Without dead ends: 170 [2021-11-09 09:38:24,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:38:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-09 09:38:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2021-11-09 09:38:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0457516339869282) internal successors, (160), 153 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 09:38:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2021-11-09 09:38:24,724 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 107 [2021-11-09 09:38:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:24,724 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2021-11-09 09:38:24,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2021-11-09 09:38:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 09:38:24,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:24,726 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:24,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:24,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:38:24,952 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1280583574, now seen corresponding path program 25 times [2021-11-09 09:38:24,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:24,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741618427] [2021-11-09 09:38:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:24,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-09 09:38:25,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:25,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741618427] [2021-11-09 09:38:25,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741618427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:25,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464856909] [2021-11-09 09:38:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:38:25,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:25,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:25,335 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:25,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:38:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:38:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-09 09:38:27,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464856909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:27,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:27,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-11-09 09:38:27,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961460771] [2021-11-09 09:38:27,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:38:27,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:38:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:38:27,294 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:28,165 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2021-11-09 09:38:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:38:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-09 09:38:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:28,167 INFO L225 Difference]: With dead ends: 164 [2021-11-09 09:38:28,168 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 09:38:28,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=634, Invalid=2228, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:38:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 09:38:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-11-09 09:38:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-11-09 09:38:28,196 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2021-11-09 09:38:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:28,196 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-11-09 09:38:28,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-11-09 09:38:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-09 09:38:28,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:28,198 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:28,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:28,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:38:28,400 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash 931456272, now seen corresponding path program 26 times [2021-11-09 09:38:28,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:28,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444263996] [2021-11-09 09:38:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:28,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 24 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:50,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:50,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444263996] [2021-11-09 09:38:50,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444263996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:50,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223896522] [2021-11-09 09:38:50,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:38:50,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:50,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:50,901 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:50,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:38:52,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:38:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:52,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 187 conjunts are in the unsatisfiable core [2021-11-09 09:38:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 499 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:39:19,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223896522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:19,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:19,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 90] total 191 [2021-11-09 09:39:19,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689693377] [2021-11-09 09:39:19,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2021-11-09 09:39:19,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2021-11-09 09:39:19,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=34997, Unknown=0, NotChecked=0, Total=36290 [2021-11-09 09:39:19,107 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 191 states, 191 states have (on average 1.162303664921466) internal successors, (222), 191 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 09:40:12,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:12,239 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2021-11-09 09:40:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-09 09:40:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.162303664921466) internal successors, (222), 191 states have internal predecessors, (222), 0 states have call successors, (0), 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 115 [2021-11-09 09:40:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:12,241 INFO L225 Difference]: With dead ends: 201 [2021-11-09 09:40:12,241 INFO L226 Difference]: Without dead ends: 197 [2021-11-09 09:40:12,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21426 ImplicationChecksByTransitivity, 81.3s TimeCoverageRelationStatistics Valid=3176, Invalid=80056, Unknown=0, NotChecked=0, Total=83232 [2021-11-09 09:40:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-09 09:40:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 165. [2021-11-09 09:40:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.048780487804878) internal successors, (172), 164 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 09:40:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2021-11-09 09:40:12,302 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 115 [2021-11-09 09:40:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:12,302 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2021-11-09 09:40:12,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.162303664921466) internal successors, (222), 191 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 09:40:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2021-11-09 09:40:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-09 09:40:12,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:12,304 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:12,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:12,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:12,516 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1829514034, now seen corresponding path program 27 times [2021-11-09 09:40:12,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:12,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081598216] [2021-11-09 09:40:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:12,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-09 09:40:12,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:12,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081598216] [2021-11-09 09:40:12,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081598216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:12,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663461983] [2021-11-09 09:40:12,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:40:12,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:12,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:12,876 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:12,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:40:15,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 09:40:15,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:40:15,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-09 09:40:16,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663461983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:16,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:16,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-11-09 09:40:16,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587320173] [2021-11-09 09:40:16,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:40:16,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:40:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:40:16,129 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:16,840 INFO L93 Difference]: Finished difference Result 345 states and 360 transitions. [2021-11-09 09:40:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:40:16,840 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-09 09:40:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:16,842 INFO L225 Difference]: With dead ends: 345 [2021-11-09 09:40:16,842 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 09:40:16,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:40:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 09:40:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2021-11-09 09:40:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0419161676646707) internal successors, (174), 167 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 09:40:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2021-11-09 09:40:16,911 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 117 [2021-11-09 09:40:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:16,911 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2021-11-09 09:40:16,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 37 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2021-11-09 09:40:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-09 09:40:16,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:16,953 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:16,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-09 09:40:17,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:17,154 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:17,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:17,155 INFO L85 PathProgramCache]: Analyzing trace with hash -903936236, now seen corresponding path program 28 times [2021-11-09 09:40:17,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:17,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829349201] [2021-11-09 09:40:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:17,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-11-09 09:40:17,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:17,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829349201] [2021-11-09 09:40:17,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829349201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:17,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92361048] [2021-11-09 09:40:17,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:40:17,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:17,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:17,538 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:17,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:40:19,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:40:19,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:19,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:40:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-11-09 09:40:20,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92361048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:20,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:20,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-11-09 09:40:20,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955993448] [2021-11-09 09:40:20,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:40:20,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:40:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:40:20,280 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 09:40:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:21,102 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2021-11-09 09:40:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:40:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 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 119 [2021-11-09 09:40:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:21,103 INFO L225 Difference]: With dead ends: 178 [2021-11-09 09:40:21,103 INFO L226 Difference]: Without dead ends: 130 [2021-11-09 09:40:21,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=751, Invalid=2671, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 09:40:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-09 09:40:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-11-09 09:40:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 09:40:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-11-09 09:40:21,139 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 119 [2021-11-09 09:40:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:21,139 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-11-09 09:40:21,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 09:40:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-11-09 09:40:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-09 09:40:21,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:21,140 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:21,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:21,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 09:40:21,344 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:21,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:21,344 INFO L85 PathProgramCache]: Analyzing trace with hash 398797882, now seen corresponding path program 29 times [2021-11-09 09:40:21,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:21,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369745716] [2021-11-09 09:40:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:21,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 31 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:48,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:48,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369745716] [2021-11-09 09:40:48,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369745716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:48,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831155510] [2021-11-09 09:40:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:40:48,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:48,066 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:48,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:40:50,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 09:40:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:50,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 206 conjunts are in the unsatisfiable core [2021-11-09 09:40:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:51,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 09:40:52,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:40:52,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:40:52,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2021-11-09 09:40:52,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794499397] [2021-11-09 09:40:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-09 09:40:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-09 09:40:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=14810, Unknown=0, NotChecked=0, Total=15750 [2021-11-09 09:40:52,195 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:33,539 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2021-11-09 09:41:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-09 09:41:33,539 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-09 09:41:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:33,541 INFO L225 Difference]: With dead ends: 214 [2021-11-09 09:41:33,541 INFO L226 Difference]: Without dead ends: 210 [2021-11-09 09:41:33,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13937 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=3735, Invalid=49395, Unknown=0, NotChecked=0, Total=53130 [2021-11-09 09:41:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-09 09:41:33,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 179. [2021-11-09 09:41:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0449438202247192) internal successors, (186), 178 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 09:41:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2021-11-09 09:41:33,618 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 125 [2021-11-09 09:41:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:33,619 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2021-11-09 09:41:33,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2021-11-09 09:41:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-09 09:41:33,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:33,621 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:33,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:33,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:33,836 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:33,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1045909468, now seen corresponding path program 30 times [2021-11-09 09:41:33,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:33,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649752867] [2021-11-09 09:41:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:33,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-09 09:41:34,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:34,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649752867] [2021-11-09 09:41:34,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649752867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:34,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107209049] [2021-11-09 09:41:34,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:41:34,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:34,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:34,260 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:34,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:41:36,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 09:41:36,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:36,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:41:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-09 09:41:37,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107209049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:37,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:37,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-11-09 09:41:37,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718775381] [2021-11-09 09:41:37,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 09:41:37,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 09:41:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:41:37,653 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 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 09:41:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:38,497 INFO L93 Difference]: Finished difference Result 373 states and 388 transitions. [2021-11-09 09:41:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:41:38,498 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 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) Word has length 127 [2021-11-09 09:41:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:38,499 INFO L225 Difference]: With dead ends: 373 [2021-11-09 09:41:38,499 INFO L226 Difference]: Without dead ends: 198 [2021-11-09 09:41:38,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:41:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-09 09:41:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 182. [2021-11-09 09:41:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0386740331491713) internal successors, (188), 181 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2021-11-09 09:41:38,572 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 127 [2021-11-09 09:41:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:38,572 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2021-11-09 09:41:38,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 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 09:41:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2021-11-09 09:41:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-09 09:41:38,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:38,574 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:38,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:38,788 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash 966043966, now seen corresponding path program 31 times [2021-11-09 09:41:38,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:38,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568017182] [2021-11-09 09:41:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:38,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2021-11-09 09:41:39,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:39,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568017182] [2021-11-09 09:41:39,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568017182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:39,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522662140] [2021-11-09 09:41:39,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:41:39,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:39,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:39,232 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:39,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:41:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:41:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2021-11-09 09:41:42,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522662140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:42,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:42,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-11-09 09:41:42,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662393662] [2021-11-09 09:41:42,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 09:41:42,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 09:41:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:41:42,285 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 09:41:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:43,289 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2021-11-09 09:41:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 09:41:43,290 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 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 129 [2021-11-09 09:41:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:43,291 INFO L225 Difference]: With dead ends: 192 [2021-11-09 09:41:43,291 INFO L226 Difference]: Without dead ends: 140 [2021-11-09 09:41:43,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=878, Invalid=3154, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:41:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-09 09:41:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2021-11-09 09:41:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 09:41:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-11-09 09:41:43,331 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2021-11-09 09:41:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:43,332 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-11-09 09:41:43,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 09:41:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-11-09 09:41:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-09 09:41:43,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:43,334 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:43,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:43,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:41:43,544 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash 741033700, now seen corresponding path program 32 times [2021-11-09 09:41:43,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:43,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840026774] [2021-11-09 09:41:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:43,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 9 proven. 711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:18,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:18,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840026774] [2021-11-09 09:42:18,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840026774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:18,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745828180] [2021-11-09 09:42:18,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:42:18,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:18,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:18,384 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:18,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:42:20,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:42:20,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:42:20,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 223 conjunts are in the unsatisfiable core [2021-11-09 09:42:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 719 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:43:03,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745828180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:03,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:43:03,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 108] total 229 [2021-11-09 09:43:03,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733030495] [2021-11-09 09:43:03,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 229 states [2021-11-09 09:43:03,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2021-11-09 09:43:03,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1343, Invalid=50869, Unknown=0, NotChecked=0, Total=52212 [2021-11-09 09:43:03,048 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 229 states, 229 states have (on average 1.1441048034934498) internal successors, (262), 229 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 09:44:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:20,869 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2021-11-09 09:44:20,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-09 09:44:20,869 INFO L78 Accepts]: Start accepts. Automaton has has 229 states, 229 states have (on average 1.1441048034934498) internal successors, (262), 229 states have internal predecessors, (262), 0 states have call successors, (0), 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 135 [2021-11-09 09:44:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:20,871 INFO L225 Difference]: With dead ends: 233 [2021-11-09 09:44:20,871 INFO L226 Difference]: Without dead ends: 229 [2021-11-09 09:44:20,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25945 ImplicationChecksByTransitivity, 122.7s TimeCoverageRelationStatistics Valid=3189, Invalid=107367, Unknown=0, NotChecked=0, Total=110556 [2021-11-09 09:44:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-09 09:44:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 193. [2021-11-09 09:44:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0416666666666667) internal successors, (200), 192 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 200 transitions. [2021-11-09 09:44:20,942 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 200 transitions. Word has length 135 [2021-11-09 09:44:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:20,942 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 200 transitions. [2021-11-09 09:44:20,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 229 states, 229 states have (on average 1.1441048034934498) internal successors, (262), 229 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 09:44:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 200 transitions. [2021-11-09 09:44:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-09 09:44:20,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:20,944 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:20,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:21,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 09:44:21,144 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash -777951226, now seen corresponding path program 33 times [2021-11-09 09:44:21,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:21,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642847413] [2021-11-09 09:44:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:21,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-11-09 09:44:21,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:21,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642847413] [2021-11-09 09:44:21,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642847413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:21,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332653577] [2021-11-09 09:44:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:44:21,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:21,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:21,638 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:21,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:44:24,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-09 09:44:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:24,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:44:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 215 proven. 144 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2021-11-09 09:44:25,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332653577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:25,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:25,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34] total 49 [2021-11-09 09:44:25,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650273243] [2021-11-09 09:44:25,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:44:25,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:44:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1895, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:44:25,687 INFO L87 Difference]: Start difference. First operand 193 states and 200 transitions. Second operand has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 09:44:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:27,351 INFO L93 Difference]: Finished difference Result 403 states and 418 transitions. [2021-11-09 09:44:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 09:44:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 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 137 [2021-11-09 09:44:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:27,352 INFO L225 Difference]: With dead ends: 403 [2021-11-09 09:44:27,352 INFO L226 Difference]: Without dead ends: 213 [2021-11-09 09:44:27,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2947 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1871, Invalid=7635, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 09:44:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-09 09:44:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-11-09 09:44:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.035897435897436) internal successors, (202), 195 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 09:44:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2021-11-09 09:44:27,413 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 137 [2021-11-09 09:44:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:27,414 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2021-11-09 09:44:27,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 09:44:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2021-11-09 09:44:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-09 09:44:27,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:27,416 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:27,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:27,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:27,617 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2087345896, now seen corresponding path program 34 times [2021-11-09 09:44:27,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:27,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211785089] [2021-11-09 09:44:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:27,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-11-09 09:44:28,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:28,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211785089] [2021-11-09 09:44:28,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211785089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:28,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877843895] [2021-11-09 09:44:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:44:28,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:28,075 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:28,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:44:30,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:44:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:30,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:44:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-11-09 09:44:31,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877843895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:31,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:31,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2021-11-09 09:44:31,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128690899] [2021-11-09 09:44:31,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 09:44:31,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:31,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 09:44:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:44:31,470 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 09:44:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:32,581 INFO L93 Difference]: Finished difference Result 206 states and 212 transitions. [2021-11-09 09:44:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:44:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 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 139 [2021-11-09 09:44:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:32,583 INFO L225 Difference]: With dead ends: 206 [2021-11-09 09:44:32,583 INFO L226 Difference]: Without dead ends: 150 [2021-11-09 09:44:32,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1015, Invalid=3677, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 09:44:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-09 09:44:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2021-11-09 09:44:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-11-09 09:44:32,637 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 139 [2021-11-09 09:44:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:32,638 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-11-09 09:44:32,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 09:44:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-11-09 09:44:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 09:44:32,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:32,640 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:32,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:32,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:32,844 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 73192718, now seen corresponding path program 35 times [2021-11-09 09:44:32,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:32,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095010987] [2021-11-09 09:44:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:32,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 90 proven. 755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:13,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:13,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095010987] [2021-11-09 09:45:13,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095010987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:13,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897396132] [2021-11-09 09:45:13,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:45:13,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:13,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:13,850 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:13,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:45:17,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-09 09:45:17,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:17,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 242 conjunts are in the unsatisfiable core [2021-11-09 09:45:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:20,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 09:45:20,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:45:20,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:20,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2021-11-09 09:45:20,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693211601] [2021-11-09 09:45:20,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-09 09:45:20,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:20,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-09 09:45:20,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1917, Invalid=19839, Unknown=0, NotChecked=0, Total=21756 [2021-11-09 09:45:20,585 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 136 states, 136 states have (on average 1.0661764705882353) internal successors, (145), 136 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:03,740 INFO L93 Difference]: Finished difference Result 247 states and 255 transitions. [2021-11-09 09:46:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-11-09 09:46:03,741 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.0661764705882353) internal successors, (145), 136 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-09 09:46:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:03,743 INFO L225 Difference]: With dead ends: 247 [2021-11-09 09:46:03,743 INFO L226 Difference]: Without dead ends: 243 [2021-11-09 09:46:03,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20599 ImplicationChecksByTransitivity, 62.6s TimeCoverageRelationStatistics Valid=5723, Invalid=55039, Unknown=0, NotChecked=0, Total=60762 [2021-11-09 09:46:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-09 09:46:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 207. [2021-11-09 09:46:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0388349514563107) internal successors, (214), 206 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 09:46:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 214 transitions. [2021-11-09 09:46:03,911 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 214 transitions. Word has length 145 [2021-11-09 09:46:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:03,912 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 214 transitions. [2021-11-09 09:46:03,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.0661764705882353) internal successors, (145), 136 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 214 transitions. [2021-11-09 09:46:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-09 09:46:03,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:03,914 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:03,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:04,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:46:04,132 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1671959472, now seen corresponding path program 36 times [2021-11-09 09:46:04,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:04,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406934921] [2021-11-09 09:46:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:04,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-09 09:46:04,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:04,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406934921] [2021-11-09 09:46:04,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406934921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:04,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226013756] [2021-11-09 09:46:04,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:46:04,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:04,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:04,688 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:04,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:46:08,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-09 09:46:08,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:08,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:46:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-09 09:46:09,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226013756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:09,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:09,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-11-09 09:46:09,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758590801] [2021-11-09 09:46:09,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 09:46:09,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 09:46:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:46:09,197 INFO L87 Difference]: Start difference. First operand 207 states and 214 transitions. Second operand has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:10,344 INFO L93 Difference]: Finished difference Result 429 states and 444 transitions. [2021-11-09 09:46:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:46:10,345 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-09 09:46:10,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:10,346 INFO L225 Difference]: With dead ends: 429 [2021-11-09 09:46:10,346 INFO L226 Difference]: Without dead ends: 226 [2021-11-09 09:46:10,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:46:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-09 09:46:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 210. [2021-11-09 09:46:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0334928229665072) internal successors, (216), 209 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 09:46:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 216 transitions. [2021-11-09 09:46:10,446 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 216 transitions. Word has length 147 [2021-11-09 09:46:10,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:10,446 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 216 transitions. [2021-11-09 09:46:10,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:10,446 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 216 transitions. [2021-11-09 09:46:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-09 09:46:10,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:10,447 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:10,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:10,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:46:10,648 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 511035410, now seen corresponding path program 37 times [2021-11-09 09:46:10,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:10,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502919850] [2021-11-09 09:46:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:10,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-11-09 09:46:11,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:11,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502919850] [2021-11-09 09:46:11,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502919850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:11,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913312794] [2021-11-09 09:46:11,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:46:11,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:11,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:11,213 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:11,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:46:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:14,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:46:14,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-11-09 09:46:15,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913312794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:15,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:15,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-11-09 09:46:15,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100123030] [2021-11-09 09:46:15,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 09:46:15,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 09:46:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:46:15,018 INFO L87 Difference]: Start difference. First operand 210 states and 216 transitions. Second operand has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 09:46:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:16,267 INFO L93 Difference]: Finished difference Result 220 states and 226 transitions. [2021-11-09 09:46:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 09:46:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-09 09:46:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:16,269 INFO L225 Difference]: With dead ends: 220 [2021-11-09 09:46:16,269 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 09:46:16,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1162, Invalid=4240, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 09:46:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 09:46:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-11-09 09:46:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 09:46:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2021-11-09 09:46:16,320 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 149 [2021-11-09 09:46:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:16,321 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2021-11-09 09:46:16,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 09:46:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2021-11-09 09:46:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-09 09:46:16,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:16,394 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:16,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:16,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e316ebdc-dda5-4ed6-ab5a-a38cd78f26d6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:46:16,594 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash -948472136, now seen corresponding path program 38 times [2021-11-09 09:46:16,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:16,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293586283] [2021-11-09 09:46:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:16,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat