./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/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_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/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_0ed72507-91a3-481d-8958-b44f71b15335/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 ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:46:20,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:46:20,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:46:20,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:46:20,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:46:20,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:46:20,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:46:20,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:46:20,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:46:20,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:46:20,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:46:20,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:46:20,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:46:20,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:46:20,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:46:20,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:46:20,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:46:20,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:46:20,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:46:20,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:46:20,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:46:20,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:46:20,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:46:20,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:46:20,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:46:20,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:46:20,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:46:20,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:46:20,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:46:20,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:46:20,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:46:20,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:46:20,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:46:20,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:46:20,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:46:20,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:46:20,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:46:20,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:46:20,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:46:20,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:46:20,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:46:20,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:46:20,586 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:46:20,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:46:20,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:46:20,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:46:20,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:46:20,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:46:20,588 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:46:20,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:46:20,589 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:46:20,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:46:20,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:46:20,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:46:20,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:46:20,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:46:20,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:46:20,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:46:20,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:46:20,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:46:20,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:46:20,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:46:20,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:46:20,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:46:20,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:46:20,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:46:20,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:46:20,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:46:20,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:46:20,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:46:20,594 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:46:20,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:46:20,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:46:20,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:46:20,595 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_0ed72507-91a3-481d-8958-b44f71b15335/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 [2021-11-09 10:46:20,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:46:20,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:46:20,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:46:20,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:46:20,869 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:46:20,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/reducercommutativity/sep05-1.i [2021-11-09 10:46:20,964 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/data/79459a8ce/b5652895fd6c41b3bc609f62e12242de/FLAG170b7a45b [2021-11-09 10:46:21,369 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:46:21,369 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/sv-benchmarks/c/reducercommutativity/sep05-1.i [2021-11-09 10:46:21,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/data/79459a8ce/b5652895fd6c41b3bc609f62e12242de/FLAG170b7a45b [2021-11-09 10:46:21,774 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/data/79459a8ce/b5652895fd6c41b3bc609f62e12242de [2021-11-09 10:46:21,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:46:21,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:46:21,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:46:21,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:46:21,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:46:21,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:21" (1/1) ... [2021-11-09 10:46:21,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435dfd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:21, skipping insertion in model container [2021-11-09 10:46:21,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:21" (1/1) ... [2021-11-09 10:46:21,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:46:21,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:46:22,045 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_0ed72507-91a3-481d-8958-b44f71b15335/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2021-11-09 10:46:22,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:46:22,055 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:46:22,075 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_0ed72507-91a3-481d-8958-b44f71b15335/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2021-11-09 10:46:22,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:46:22,089 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:46:22,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22 WrapperNode [2021-11-09 10:46:22,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:46:22,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:46:22,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:46:22,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:46:22,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:46:22,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:46:22,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:46:22,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:46:22,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:46:22,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:46:22,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:46:22,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:46:22,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (1/1) ... [2021-11-09 10:46:22,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:46:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:22,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:46:22,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:46:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:46:22,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:46:22,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:46:22,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:46:22,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:46:22,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:46:22,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:46:22,526 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:46:22,526 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-09 10:46:22,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:22 BoogieIcfgContainer [2021-11-09 10:46:22,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:46:22,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:46:22,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:46:22,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:46:22,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:46:21" (1/3) ... [2021-11-09 10:46:22,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1852ba19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:22, skipping insertion in model container [2021-11-09 10:46:22,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:22" (2/3) ... [2021-11-09 10:46:22,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1852ba19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:22, skipping insertion in model container [2021-11-09 10:46:22,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:22" (3/3) ... [2021-11-09 10:46:22,537 INFO L111 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2021-11-09 10:46:22,543 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:46:22,543 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:46:22,589 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:46:22,596 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:46:22,596 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:46:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:46:22,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:22,618 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 10:46:22,618 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash -23080620, now seen corresponding path program 1 times [2021-11-09 10:46:22,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:22,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943169236] [2021-11-09 10:46:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:22,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:22,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:22,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943169236] [2021-11-09 10:46:22,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943169236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:22,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:22,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:22,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104821628] [2021-11-09 10:46:22,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:46:22,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:22,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:46:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:22,854 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:22,897 INFO L93 Difference]: Finished difference Result 58 states and 84 transitions. [2021-11-09 10:46:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:46:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 10:46:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:22,911 INFO L225 Difference]: With dead ends: 58 [2021-11-09 10:46:22,912 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 10:46:22,915 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 10:46:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 10:46:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-09 10:46:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-09 10:46:22,951 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2021-11-09 10:46:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:22,951 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-09 10:46:22,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-09 10:46:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:46:22,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:22,953 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:22,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:46:22,954 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash -507200985, now seen corresponding path program 1 times [2021-11-09 10:46:22,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:22,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359175288] [2021-11-09 10:46:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:22,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:23,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:23,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359175288] [2021-11-09 10:46:23,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359175288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:23,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946315990] [2021-11-09 10:46:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:23,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:23,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:23,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:23,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:46:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:23,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:46:23,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:23,245 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 10:46:23,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946315990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:23,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:23,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 10:46:23,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431342842] [2021-11-09 10:46:23,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:46:23,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:23,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:46:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:23,250 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:23,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:23,311 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-09 10:46:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:46:23,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 10:46:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:23,314 INFO L225 Difference]: With dead ends: 54 [2021-11-09 10:46:23,315 INFO L226 Difference]: Without dead ends: 36 [2021-11-09 10:46:23,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-09 10:46:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-09 10:46:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-09 10:46:23,322 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-11-09 10:46:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:23,323 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-09 10:46:23,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-09 10:46:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:46:23,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:23,324 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:23,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:23,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:23,551 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1833868074, now seen corresponding path program 1 times [2021-11-09 10:46:23,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:23,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342641855] [2021-11-09 10:46:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:23,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:46:23,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:23,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342641855] [2021-11-09 10:46:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342641855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:23,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775542453] [2021-11-09 10:46:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:23,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:23,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:23,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:46:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:46:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 10:46:23,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775542453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:23,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:23,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 10:46:23,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191663686] [2021-11-09 10:46:23,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:46:23,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:46:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:23,829 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:23,851 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-11-09 10:46:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:46:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 10:46:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:23,853 INFO L225 Difference]: With dead ends: 42 [2021-11-09 10:46:23,855 INFO L226 Difference]: Without dead ends: 32 [2021-11-09 10:46:23,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-09 10:46:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-09 10:46:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-09 10:46:23,865 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2021-11-09 10:46:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:23,866 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-09 10:46:23,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-09 10:46:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:46:23,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:23,869 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:23,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:24,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:24,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1777663060, now seen corresponding path program 1 times [2021-11-09 10:46:24,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:24,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615117255] [2021-11-09 10:46:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:24,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:24,180 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 10:46:24,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:24,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615117255] [2021-11-09 10:46:24,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615117255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:24,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354135034] [2021-11-09 10:46:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:24,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:24,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:24,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:24,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:46:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:24,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:46:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:24,421 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 10:46:24,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354135034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:24,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:24,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 10:46:24,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669105590] [2021-11-09 10:46:24,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:46:24,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:46:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:24,426 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:24,454 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-11-09 10:46:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:24,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:46:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:24,456 INFO L225 Difference]: With dead ends: 60 [2021-11-09 10:46:24,456 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 10:46:24,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 10:46:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-09 10:46:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-09 10:46:24,462 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2021-11-09 10:46:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:24,463 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-09 10:46:24,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-09 10:46:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:46:24,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:24,464 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:24,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:24,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:24,691 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:24,691 INFO L85 PathProgramCache]: Analyzing trace with hash -861329106, now seen corresponding path program 2 times [2021-11-09 10:46:24,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:24,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119738446] [2021-11-09 10:46:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:24,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:24,764 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 10:46:24,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:24,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119738446] [2021-11-09 10:46:24,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119738446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:24,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938135531] [2021-11-09 10:46:24,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:24,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:24,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:24,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:24,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:46:24,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:24,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:24,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:46:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 10:46:25,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938135531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:25,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:25,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-09 10:46:25,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971934874] [2021-11-09 10:46:25,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:46:25,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:46:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:25,006 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:25,081 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-11-09 10:46:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:46:25,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:46:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:25,082 INFO L225 Difference]: With dead ends: 77 [2021-11-09 10:46:25,083 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 10:46:25,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 10:46:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-11-09 10:46:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-11-09 10:46:25,090 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2021-11-09 10:46:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:25,090 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-11-09 10:46:25,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-11-09 10:46:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 10:46:25,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:25,092 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:25,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:25,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:25,315 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:25,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1600422655, now seen corresponding path program 3 times [2021-11-09 10:46:25,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:25,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721228706] [2021-11-09 10:46:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:25,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 10:46:25,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:25,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721228706] [2021-11-09 10:46:25,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721228706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:25,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015452154] [2021-11-09 10:46:25,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:46:25,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:25,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:25,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:25,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:46:25,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 10:46:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:25,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:46:25,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 10:46:25,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015452154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:25,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:25,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 10:46:25,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321193643] [2021-11-09 10:46:25,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:46:25,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:46:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:25,600 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:25,622 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-11-09 10:46:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:25,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 10:46:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:25,629 INFO L225 Difference]: With dead ends: 60 [2021-11-09 10:46:25,630 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 10:46:25,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 10:46:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-09 10:46:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-09 10:46:25,648 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 43 [2021-11-09 10:46:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:25,649 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-09 10:46:25,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-09 10:46:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:46:25,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:25,653 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:25,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:25,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:25,875 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash 477657599, now seen corresponding path program 4 times [2021-11-09 10:46:25,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:25,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300044774] [2021-11-09 10:46:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:25,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-09 10:46:25,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:25,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300044774] [2021-11-09 10:46:25,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300044774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:25,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99113587] [2021-11-09 10:46:25,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:46:25,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:25,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:25,967 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:25,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:46:26,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:46:26,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:26,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:46:26,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-09 10:46:26,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99113587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:26,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:26,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-09 10:46:26,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163124197] [2021-11-09 10:46:26,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:46:26,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:46:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:26,214 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 10:46:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:26,296 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2021-11-09 10:46:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:46:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 45 [2021-11-09 10:46:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:26,300 INFO L225 Difference]: With dead ends: 101 [2021-11-09 10:46:26,300 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 10:46:26,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:26,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 10:46:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-11-09 10:46:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.25) internal successors, (70), 56 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 10:46:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2021-11-09 10:46:26,320 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 45 [2021-11-09 10:46:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:26,320 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2021-11-09 10:46:26,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 10:46:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2021-11-09 10:46:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 10:46:26,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:26,322 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:26,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:26,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 10:46:26,542 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:26,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:26,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2141553364, now seen corresponding path program 5 times [2021-11-09 10:46:26,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:26,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174525377] [2021-11-09 10:46:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:26,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-09 10:46:26,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:26,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174525377] [2021-11-09 10:46:26,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174525377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:26,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968880281] [2021-11-09 10:46:26,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:46:26,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:26,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:26,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:26,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:46:26,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 10:46:26,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:26,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:46:26,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 10:46:27,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968880281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:27,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:27,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-09 10:46:27,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305703615] [2021-11-09 10:46:27,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:46:27,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:46:27,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:46:27,036 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:27,134 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-11-09 10:46:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:46:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-09 10:46:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:27,135 INFO L225 Difference]: With dead ends: 120 [2021-11-09 10:46:27,135 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 10:46:27,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:46:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 10:46:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-11-09 10:46:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-11-09 10:46:27,148 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 56 [2021-11-09 10:46:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:27,148 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-11-09 10:46:27,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-11-09 10:46:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:46:27,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:27,154 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:27,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:27,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:27,379 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:27,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1510106789, now seen corresponding path program 6 times [2021-11-09 10:46:27,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:27,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629287267] [2021-11-09 10:46:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:27,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:27,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:27,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629287267] [2021-11-09 10:46:27,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629287267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:27,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673992023] [2021-11-09 10:46:27,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:46:27,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:27,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:27,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:46:27,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:46:27,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:46:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-09 10:46:28,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673992023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:28,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:28,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-11-09 10:46:28,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454366304] [2021-11-09 10:46:28,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:46:28,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:46:28,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:28,069 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:28,140 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2021-11-09 10:46:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:46:28,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 10:46:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:28,141 INFO L225 Difference]: With dead ends: 121 [2021-11-09 10:46:28,141 INFO L226 Difference]: Without dead ends: 80 [2021-11-09 10:46:28,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-09 10:46:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-09 10:46:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2021-11-09 10:46:28,147 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 67 [2021-11-09 10:46:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:28,147 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2021-11-09 10:46:28,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2021-11-09 10:46:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:46:28,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:28,149 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:28,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:28,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:28,366 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:28,367 INFO L85 PathProgramCache]: Analyzing trace with hash 844556664, now seen corresponding path program 7 times [2021-11-09 10:46:28,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:28,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147017988] [2021-11-09 10:46:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:28,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-09 10:46:28,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:28,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147017988] [2021-11-09 10:46:28,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147017988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:28,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711478645] [2021-11-09 10:46:28,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:46:28,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:28,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:28,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:28,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:46:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:46:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-09 10:46:28,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711478645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:28,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:28,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 10:46:28,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904629380] [2021-11-09 10:46:28,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:46:28,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:46:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:28,857 INFO L87 Difference]: Start difference. First operand 79 states and 98 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 10:46:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:28,876 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2021-11-09 10:46:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:28,877 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 78 [2021-11-09 10:46:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:28,879 INFO L225 Difference]: With dead ends: 103 [2021-11-09 10:46:28,879 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 10:46:28,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 10:46:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-09 10:46:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.25) internal successors, (100), 80 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 10:46:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2021-11-09 10:46:28,889 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 78 [2021-11-09 10:46:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:28,891 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2021-11-09 10:46:28,891 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 10:46:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2021-11-09 10:46:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:46:28,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:28,897 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:28,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:29,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:29,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash -729603206, now seen corresponding path program 8 times [2021-11-09 10:46:29,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:29,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509075528] [2021-11-09 10:46:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:29,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-09 10:46:30,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:30,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509075528] [2021-11-09 10:46:30,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509075528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:30,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775733796] [2021-11-09 10:46:30,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:30,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:30,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:30,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:30,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:46:30,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:30,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:46:30,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-09 10:46:31,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775733796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:31,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:31,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 28 [2021-11-09 10:46:31,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655425458] [2021-11-09 10:46:31,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:46:31,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:46:31,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:46:31,718 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:32,633 INFO L93 Difference]: Finished difference Result 586 states and 708 transitions. [2021-11-09 10:46:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:46:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:46:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:32,637 INFO L225 Difference]: With dead ends: 586 [2021-11-09 10:46:32,638 INFO L226 Difference]: Without dead ends: 581 [2021-11-09 10:46:32,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 68 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:46:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-09 10:46:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 216. [2021-11-09 10:46:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3395348837209302) internal successors, (288), 215 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2021-11-09 10:46:32,656 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 80 [2021-11-09 10:46:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:32,657 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2021-11-09 10:46:32,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2021-11-09 10:46:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:46:32,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:32,659 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:32,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:32,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:32,887 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1045404156, now seen corresponding path program 1 times [2021-11-09 10:46:32,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:32,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210192916] [2021-11-09 10:46:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:32,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 74 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-09 10:46:33,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:33,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210192916] [2021-11-09 10:46:33,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210192916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:33,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307463934] [2021-11-09 10:46:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:33,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:33,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:33,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:33,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:46:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:46:33,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:34,091 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 22 treesize of output 17 [2021-11-09 10:46:34,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-09 10:46:34,373 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 10:46:34,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-09 10:46:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-09 10:46:34,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307463934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:34,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:34,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 25 [2021-11-09 10:46:34,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916097931] [2021-11-09 10:46:34,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:46:34,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:46:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:46:34,689 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:36,065 INFO L93 Difference]: Finished difference Result 478 states and 629 transitions. [2021-11-09 10:46:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:46:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:46:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:36,069 INFO L225 Difference]: With dead ends: 478 [2021-11-09 10:46:36,070 INFO L226 Difference]: Without dead ends: 353 [2021-11-09 10:46:36,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 10:46:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-09 10:46:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 274. [2021-11-09 10:46:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.3113553113553114) internal successors, (358), 273 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 358 transitions. [2021-11-09 10:46:36,100 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 358 transitions. Word has length 80 [2021-11-09 10:46:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:36,101 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 358 transitions. [2021-11-09 10:46:36,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 358 transitions. [2021-11-09 10:46:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:46:36,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:36,103 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:36,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:36,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:46:36,327 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1122630216, now seen corresponding path program 2 times [2021-11-09 10:46:36,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:36,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119384270] [2021-11-09 10:46:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:36,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:46:38,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:38,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119384270] [2021-11-09 10:46:38,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119384270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:38,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520182256] [2021-11-09 10:46:38,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:38,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:38,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:38,031 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:38,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:46:38,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:38,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 10:46:38,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:38,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2021-11-09 10:46:38,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:38,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:38,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:38,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 33 treesize of output 33 [2021-11-09 10:46:39,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 63 [2021-11-09 10:46:39,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 35 treesize of output 40 [2021-11-09 10:46:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:46:39,277 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 6 case distinctions, treesize of input 64 treesize of output 55 [2021-11-09 10:46:39,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:46:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:46:39,429 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 6 case distinctions, treesize of input 59 treesize of output 61 [2021-11-09 10:46:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:39,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:46:39,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 38 [2021-11-09 10:46:39,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:46:39,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-11-09 10:46:39,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-09 10:46:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 90 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 10:46:40,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520182256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:40,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:40,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 47 [2021-11-09 10:46:40,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671889409] [2021-11-09 10:46:40,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 10:46:40,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 10:46:40,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 10:46:40,011 INFO L87 Difference]: Start difference. First operand 274 states and 358 transitions. Second operand has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:41,868 INFO L93 Difference]: Finished difference Result 692 states and 913 transitions. [2021-11-09 10:46:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 10:46:41,869 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:46:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:41,873 INFO L225 Difference]: With dead ends: 692 [2021-11-09 10:46:41,873 INFO L226 Difference]: Without dead ends: 553 [2021-11-09 10:46:41,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=301, Invalid=3239, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 10:46:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-09 10:46:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 470. [2021-11-09 10:46:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.32409381663113) internal successors, (621), 469 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 621 transitions. [2021-11-09 10:46:41,915 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 621 transitions. Word has length 80 [2021-11-09 10:46:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:41,915 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 621 transitions. [2021-11-09 10:46:41,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 621 transitions. [2021-11-09 10:46:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:46:41,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:41,918 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:41,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:42,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:46:42,143 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1316409220, now seen corresponding path program 3 times [2021-11-09 10:46:42,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:42,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102541100] [2021-11-09 10:46:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:42,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 21 proven. 116 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 10:46:43,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:43,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102541100] [2021-11-09 10:46:43,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102541100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:43,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570877223] [2021-11-09 10:46:43,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:46:43,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:43,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:43,415 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:43,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:46:43,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:46:43,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 10:46:43,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:44,036 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 22 treesize of output 17 [2021-11-09 10:46:44,580 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 10:46:44,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-11-09 10:46:44,863 INFO L354 Elim1Store]: treesize reduction 248, result has 19.0 percent of original size [2021-11-09 10:46:44,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 91 [2021-11-09 10:47:09,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~2] [2021-11-09 10:47:09,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:47:09,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-09 10:47:09,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737293960] [2021-11-09 10:47:09,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 10:47:09,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:09,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 10:47:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1551, Unknown=11, NotChecked=0, Total=1722 [2021-11-09 10:47:09,117 INFO L87 Difference]: Start difference. First operand 470 states and 621 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 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 10:47:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:31,298 INFO L93 Difference]: Finished difference Result 1209 states and 1598 transitions. [2021-11-09 10:47:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:47:31,298 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 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 80 [2021-11-09 10:47:31,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:31,303 INFO L225 Difference]: With dead ends: 1209 [2021-11-09 10:47:31,304 INFO L226 Difference]: Without dead ends: 947 [2021-11-09 10:47:31,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=366, Invalid=3153, Unknown=21, NotChecked=0, Total=3540 [2021-11-09 10:47:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-09 10:47:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 815. [2021-11-09 10:47:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 1.3144963144963144) internal successors, (1070), 814 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1070 transitions. [2021-11-09 10:47:31,370 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1070 transitions. Word has length 80 [2021-11-09 10:47:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:31,370 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 1070 transitions. [2021-11-09 10:47:31,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 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 10:47:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1070 transitions. [2021-11-09 10:47:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:47:31,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:31,373 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:31,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:31,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 10:47:31,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1750671560, now seen corresponding path program 4 times [2021-11-09 10:47:31,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:31,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255802698] [2021-11-09 10:47:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:31,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 107 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 10:47:32,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:32,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255802698] [2021-11-09 10:47:32,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255802698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:32,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685853890] [2021-11-09 10:47:32,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:47:32,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:32,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:32,649 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:32,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:47:33,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:47:33,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 10:47:33,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:33,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:33,347 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 22 treesize of output 17 [2021-11-09 10:47:34,061 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-11-09 10:47:34,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-09 10:47:34,263 INFO L354 Elim1Store]: treesize reduction 228, result has 8.8 percent of original size [2021-11-09 10:47:34,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 47 [2021-11-09 10:47:34,448 INFO L354 Elim1Store]: treesize reduction 177, result has 12.4 percent of original size [2021-11-09 10:47:34,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 50 [2021-11-09 10:47:34,581 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-09 10:47:34,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 59 treesize of output 56 [2021-11-09 10:47:34,764 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-09 10:47:34,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 36 [2021-11-09 10:47:34,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-09 10:47:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:47:34,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685853890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:34,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:34,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 55 [2021-11-09 10:47:34,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135117721] [2021-11-09 10:47:34,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 10:47:34,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 10:47:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2755, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:47:34,935 INFO L87 Difference]: Start difference. First operand 815 states and 1070 transitions. Second operand has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 55 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:42,394 INFO L93 Difference]: Finished difference Result 2708 states and 3527 transitions. [2021-11-09 10:47:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-09 10:47:42,395 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 55 states have internal predecessors, (122), 0 states have call successors, (0), 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 80 [2021-11-09 10:47:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:42,412 INFO L225 Difference]: With dead ends: 2708 [2021-11-09 10:47:42,413 INFO L226 Difference]: Without dead ends: 2215 [2021-11-09 10:47:42,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1745, Invalid=13261, Unknown=0, NotChecked=0, Total=15006 [2021-11-09 10:47:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-11-09 10:47:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1559. [2021-11-09 10:47:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 1.3112965340179719) internal successors, (2043), 1558 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2043 transitions. [2021-11-09 10:47:42,598 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2043 transitions. Word has length 80 [2021-11-09 10:47:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:42,599 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 2043 transitions. [2021-11-09 10:47:42,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 55 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2043 transitions. [2021-11-09 10:47:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:47:42,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:42,603 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:42,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:42,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:42,831 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1876420348, now seen corresponding path program 5 times [2021-11-09 10:47:42,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:42,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691436278] [2021-11-09 10:47:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:42,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-09 10:47:43,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691436278] [2021-11-09 10:47:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691436278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036962792] [2021-11-09 10:47:43,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:47:43,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:43,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:43,530 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:43,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:47:44,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 10:47:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 10:47:44,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:44,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:44,223 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 22 treesize of output 17 [2021-11-09 10:47:44,412 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-09 10:47:44,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-11-09 10:47:44,543 INFO L354 Elim1Store]: treesize reduction 188, result has 21.0 percent of original size [2021-11-09 10:47:44,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 75 [2021-11-09 10:47:44,780 INFO L354 Elim1Store]: treesize reduction 311, result has 12.9 percent of original size [2021-11-09 10:47:44,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 89 treesize of output 89 [2021-11-09 10:47:45,050 INFO L354 Elim1Store]: treesize reduction 311, result has 12.9 percent of original size [2021-11-09 10:47:45,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 95 treesize of output 95 [2021-11-09 10:47:45,142 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-09 10:47:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 34 [2021-11-09 10:47:45,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:47:45,182 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 21 treesize of output 21 [2021-11-09 10:47:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-09 10:47:45,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036962792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:45,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:45,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 35 [2021-11-09 10:47:45,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203724034] [2021-11-09 10:47:45,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 10:47:45,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 10:47:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:47:45,435 INFO L87 Difference]: Start difference. First operand 1559 states and 2043 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:50,415 INFO L93 Difference]: Finished difference Result 3154 states and 3919 transitions. [2021-11-09 10:47:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 10:47:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 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 80 [2021-11-09 10:47:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:50,424 INFO L225 Difference]: With dead ends: 3154 [2021-11-09 10:47:50,424 INFO L226 Difference]: Without dead ends: 1684 [2021-11-09 10:47:50,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1333, Invalid=8369, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 10:47:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-11-09 10:47:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1327. [2021-11-09 10:47:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 1.1327300150829562) internal successors, (1502), 1326 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1502 transitions. [2021-11-09 10:47:50,598 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1502 transitions. Word has length 80 [2021-11-09 10:47:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:50,598 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 1502 transitions. [2021-11-09 10:47:50,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1502 transitions. [2021-11-09 10:47:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:47:50,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:50,608 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:50,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:50,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 10:47:50,831 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash -285702532, now seen corresponding path program 1 times [2021-11-09 10:47:50,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:50,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939547172] [2021-11-09 10:47:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:50,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 10:47:51,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:51,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939547172] [2021-11-09 10:47:51,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939547172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:51,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001648125] [2021-11-09 10:47:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:51,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:51,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:51,643 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:51,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:47:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:52,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 10:47:52,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:52,694 INFO L354 Elim1Store]: treesize reduction 86, result has 16.5 percent of original size [2021-11-09 10:47:52,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 32 [2021-11-09 10:47:52,830 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-09 10:47:52,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 10:47:52,976 INFO L354 Elim1Store]: treesize reduction 204, result has 14.3 percent of original size [2021-11-09 10:47:52,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 57 treesize of output 54 [2021-11-09 10:47:53,096 INFO L354 Elim1Store]: treesize reduction 204, result has 14.3 percent of original size [2021-11-09 10:47:53,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 57 treesize of output 54 [2021-11-09 10:47:53,228 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-09 10:47:53,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 37 [2021-11-09 10:47:53,307 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-09 10:47:53,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 28 [2021-11-09 10:47:53,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-09 10:47:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 90 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 10:47:53,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001648125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:53,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:53,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 44 [2021-11-09 10:47:53,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609811709] [2021-11-09 10:47:53,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 10:47:53,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 10:47:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:47:53,556 INFO L87 Difference]: Start difference. First operand 1327 states and 1502 transitions. Second operand has 44 states, 44 states have (on average 2.727272727272727) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:56,144 INFO L93 Difference]: Finished difference Result 1648 states and 1852 transitions. [2021-11-09 10:47:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:47:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.727272727272727) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:47:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:56,153 INFO L225 Difference]: With dead ends: 1648 [2021-11-09 10:47:56,153 INFO L226 Difference]: Without dead ends: 1337 [2021-11-09 10:47:56,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=304, Invalid=4118, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 10:47:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-11-09 10:47:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1327. [2021-11-09 10:47:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 1.1191553544494721) internal successors, (1484), 1326 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1484 transitions. [2021-11-09 10:47:56,324 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1484 transitions. Word has length 80 [2021-11-09 10:47:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:56,325 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 1484 transitions. [2021-11-09 10:47:56,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.727272727272727) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1484 transitions. [2021-11-09 10:47:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:47:56,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:56,331 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:56,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:56,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:47:56,547 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1522735044, now seen corresponding path program 1 times [2021-11-09 10:47:56,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:56,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940238902] [2021-11-09 10:47:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:56,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 10:47:57,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:57,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940238902] [2021-11-09 10:47:57,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940238902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:57,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150214964] [2021-11-09 10:47:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:57,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:57,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:57,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:57,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:47:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:47:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:47:58,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150214964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:58,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:58,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 24 [2021-11-09 10:47:58,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922301858] [2021-11-09 10:47:58,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:47:58,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:58,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:47:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:47:58,805 INFO L87 Difference]: Start difference. First operand 1327 states and 1484 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:59,507 INFO L93 Difference]: Finished difference Result 1681 states and 1870 transitions. [2021-11-09 10:47:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:47:59,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:47:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:59,515 INFO L225 Difference]: With dead ends: 1681 [2021-11-09 10:47:59,515 INFO L226 Difference]: Without dead ends: 1653 [2021-11-09 10:47:59,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:47:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-11-09 10:47:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1421. [2021-11-09 10:47:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 1.1161971830985915) internal successors, (1585), 1420 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1585 transitions. [2021-11-09 10:47:59,687 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1585 transitions. Word has length 80 [2021-11-09 10:47:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:59,688 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1585 transitions. [2021-11-09 10:47:59,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1585 transitions. [2021-11-09 10:47:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:47:59,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:59,692 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:59,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:59,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:47:59,907 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash -688928456, now seen corresponding path program 2 times [2021-11-09 10:47:59,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:59,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359486987] [2021-11-09 10:47:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:59,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-09 10:48:00,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:00,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359486987] [2021-11-09 10:48:00,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359486987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:00,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242192874] [2021-11-09 10:48:00,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:48:00,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:00,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:00,903 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:00,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:48:01,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:48:01,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:01,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:48:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:01,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2021-11-09 10:48:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 29 treesize of output 33 [2021-11-09 10:48:02,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 10:48:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:48:02,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242192874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:02,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:02,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 28 [2021-11-09 10:48:02,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833904991] [2021-11-09 10:48:02,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:48:02,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:02,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:48:02,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:48:02,264 INFO L87 Difference]: Start difference. First operand 1421 states and 1585 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:03,518 INFO L93 Difference]: Finished difference Result 1916 states and 2140 transitions. [2021-11-09 10:48:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:48:03,519 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:48:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:03,525 INFO L225 Difference]: With dead ends: 1916 [2021-11-09 10:48:03,525 INFO L226 Difference]: Without dead ends: 1435 [2021-11-09 10:48:03,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:48:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-11-09 10:48:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1421. [2021-11-09 10:48:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 1.1042253521126761) internal successors, (1568), 1420 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1568 transitions. [2021-11-09 10:48:03,713 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1568 transitions. Word has length 80 [2021-11-09 10:48:03,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:03,713 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1568 transitions. [2021-11-09 10:48:03,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:03,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1568 transitions. [2021-11-09 10:48:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:48:03,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:03,717 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:03,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:03,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:03,933 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1718287754, now seen corresponding path program 1 times [2021-11-09 10:48:03,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:03,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844397052] [2021-11-09 10:48:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:03,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 21 proven. 118 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 10:48:05,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:05,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844397052] [2021-11-09 10:48:05,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844397052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:05,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455547593] [2021-11-09 10:48:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:05,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:05,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:05,228 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:05,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:48:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:05,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 10:48:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:06,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 51 [2021-11-09 10:48:06,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 37 treesize of output 37 [2021-11-09 10:48:06,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2021-11-09 10:48:06,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 10:48:06,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:06,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:48:06,560 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 6 case distinctions, treesize of input 61 treesize of output 63 [2021-11-09 10:48:06,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:48:06,676 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-09 10:48:06,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 65 [2021-11-09 10:48:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:06,814 INFO L354 Elim1Store]: treesize reduction 123, result has 23.1 percent of original size [2021-11-09 10:48:06,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 65 [2021-11-09 10:48:11,038 INFO L354 Elim1Store]: treesize reduction 96, result has 25.6 percent of original size [2021-11-09 10:48:11,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 68 treesize of output 80 [2021-11-09 10:48:11,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 10:48:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 10:48:11,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455547593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:11,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:11,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24] total 40 [2021-11-09 10:48:11,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192414196] [2021-11-09 10:48:11,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 10:48:11,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:11,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 10:48:11,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1397, Unknown=2, NotChecked=0, Total=1560 [2021-11-09 10:48:11,283 INFO L87 Difference]: Start difference. First operand 1421 states and 1568 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:25,106 INFO L93 Difference]: Finished difference Result 1625 states and 1805 transitions. [2021-11-09 10:48:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 10:48:25,108 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:48:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:25,113 INFO L225 Difference]: With dead ends: 1625 [2021-11-09 10:48:25,113 INFO L226 Difference]: Without dead ends: 1591 [2021-11-09 10:48:25,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=469, Invalid=4215, Unknown=8, NotChecked=0, Total=4692 [2021-11-09 10:48:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-11-09 10:48:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1521. [2021-11-09 10:48:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.1157894736842104) internal successors, (1696), 1520 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1696 transitions. [2021-11-09 10:48:25,288 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1696 transitions. Word has length 80 [2021-11-09 10:48:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:25,288 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 1696 transitions. [2021-11-09 10:48:25,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1696 transitions. [2021-11-09 10:48:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:48:25,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:25,292 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:25,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:25,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:25,519 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:25,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:25,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1196741690, now seen corresponding path program 2 times [2021-11-09 10:48:25,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:25,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544036269] [2021-11-09 10:48:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:25,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 10:48:26,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:26,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544036269] [2021-11-09 10:48:26,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544036269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:26,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498666260] [2021-11-09 10:48:26,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:48:26,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:26,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:26,158 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:26,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:48:26,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:48:26,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:48:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 10:48:27,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498666260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:27,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:27,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2021-11-09 10:48:27,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507647150] [2021-11-09 10:48:27,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:48:27,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:27,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:48:27,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:48:27,750 INFO L87 Difference]: Start difference. First operand 1521 states and 1696 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:28,556 INFO L93 Difference]: Finished difference Result 1992 states and 2208 transitions. [2021-11-09 10:48:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:48:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:48:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:28,564 INFO L225 Difference]: With dead ends: 1992 [2021-11-09 10:48:28,564 INFO L226 Difference]: Without dead ends: 1967 [2021-11-09 10:48:28,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:48:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-11-09 10:48:28,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1581. [2021-11-09 10:48:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 1.1145569620253164) internal successors, (1761), 1580 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 1761 transitions. [2021-11-09 10:48:28,734 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 1761 transitions. Word has length 80 [2021-11-09 10:48:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:28,735 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 1761 transitions. [2021-11-09 10:48:28,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 1761 transitions. [2021-11-09 10:48:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:48:28,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:28,739 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:28,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-09 10:48:28,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 10:48:28,967 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:28,967 INFO L85 PathProgramCache]: Analyzing trace with hash -168903428, now seen corresponding path program 3 times [2021-11-09 10:48:28,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:28,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062555543] [2021-11-09 10:48:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:28,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 10:48:29,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:29,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062555543] [2021-11-09 10:48:29,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062555543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:29,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973269353] [2021-11-09 10:48:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:48:29,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:29,898 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:29,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:48:30,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:48:30,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 10:48:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:31,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 51 [2021-11-09 10:48:31,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 37 treesize of output 37 [2021-11-09 10:48:31,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2021-11-09 10:48:31,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 10:48:31,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:48:31,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 40 [2021-11-09 10:48:31,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:31,917 INFO L354 Elim1Store]: treesize reduction 123, result has 23.1 percent of original size [2021-11-09 10:48:31,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 62 [2021-11-09 10:48:34,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,192 INFO L354 Elim1Store]: treesize reduction 272, result has 26.1 percent of original size [2021-11-09 10:48:34,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 135 [2021-11-09 10:48:44,791 INFO L354 Elim1Store]: treesize reduction 220, result has 29.7 percent of original size [2021-11-09 10:48:44,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 125 treesize of output 175 [2021-11-09 10:48:45,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 10:48:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:48:45,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973269353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:45,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 43 [2021-11-09 10:48:45,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73312979] [2021-11-09 10:48:45,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 10:48:45,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 10:48:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1640, Unknown=4, NotChecked=0, Total=1806 [2021-11-09 10:48:45,644 INFO L87 Difference]: Start difference. First operand 1581 states and 1761 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:46,727 WARN L207 SmtUtils]: Spent 7.83 s on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-11-09 10:50:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:12,097 INFO L93 Difference]: Finished difference Result 2485 states and 2721 transitions. [2021-11-09 10:50:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-11-09 10:50:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 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 80 [2021-11-09 10:50:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:12,106 INFO L225 Difference]: With dead ends: 2485 [2021-11-09 10:50:12,106 INFO L226 Difference]: Without dead ends: 1984 [2021-11-09 10:50:12,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9620 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=3452, Invalid=26635, Unknown=15, NotChecked=0, Total=30102 [2021-11-09 10:50:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-11-09 10:50:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1569. [2021-11-09 10:50:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 1.09375) internal successors, (1715), 1568 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 1715 transitions. [2021-11-09 10:50:12,294 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 1715 transitions. Word has length 80 [2021-11-09 10:50:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:12,294 INFO L470 AbstractCegarLoop]: Abstraction has 1569 states and 1715 transitions. [2021-11-09 10:50:12,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 1715 transitions. [2021-11-09 10:50:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:12,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:12,299 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:12,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-09 10:50:12,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 10:50:12,527 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:12,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:12,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1953151674, now seen corresponding path program 3 times [2021-11-09 10:50:12,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:12,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080820793] [2021-11-09 10:50:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:12,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 10:50:13,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:13,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080820793] [2021-11-09 10:50:13,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080820793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:13,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420899659] [2021-11-09 10:50:13,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:50:13,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:13,228 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:13,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:50:14,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:50:14,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:50:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-09 10:50:15,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420899659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:15,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:15,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2021-11-09 10:50:15,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813673355] [2021-11-09 10:50:15,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:50:15,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:50:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:50:15,069 INFO L87 Difference]: Start difference. First operand 1569 states and 1715 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 10:50:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:15,694 INFO L93 Difference]: Finished difference Result 1849 states and 2009 transitions. [2021-11-09 10:50:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:50:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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) Word has length 80 [2021-11-09 10:50:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:15,701 INFO L225 Difference]: With dead ends: 1849 [2021-11-09 10:50:15,701 INFO L226 Difference]: Without dead ends: 1827 [2021-11-09 10:50:15,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 18 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:50:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-11-09 10:50:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1596. [2021-11-09 10:50:15,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 1.0927899686520377) internal successors, (1743), 1595 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 1743 transitions. [2021-11-09 10:50:15,873 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 1743 transitions. Word has length 80 [2021-11-09 10:50:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:15,873 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 1743 transitions. [2021-11-09 10:50:15,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 10:50:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 1743 transitions. [2021-11-09 10:50:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:15,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:15,878 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:15,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:16,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:16,091 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1160019836, now seen corresponding path program 4 times [2021-11-09 10:50:16,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:16,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306325573] [2021-11-09 10:50:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:16,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-09 10:50:16,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:16,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306325573] [2021-11-09 10:50:16,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306325573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:16,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314085539] [2021-11-09 10:50:16,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:50:16,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:16,807 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:16,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:50:18,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:50:18,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:50:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-09 10:50:19,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314085539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:19,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:19,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 22 [2021-11-09 10:50:19,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079983900] [2021-11-09 10:50:19,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:50:19,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:19,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:50:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:50:19,112 INFO L87 Difference]: Start difference. First operand 1596 states and 1743 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 10:50:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:20,071 INFO L93 Difference]: Finished difference Result 2172 states and 2360 transitions. [2021-11-09 10:50:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:50:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 80 [2021-11-09 10:50:20,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:20,079 INFO L225 Difference]: With dead ends: 2172 [2021-11-09 10:50:20,080 INFO L226 Difference]: Without dead ends: 2141 [2021-11-09 10:50:20,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 17 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:50:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-09 10:50:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1755. [2021-11-09 10:50:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 1.0929304446978336) internal successors, (1917), 1754 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 1917 transitions. [2021-11-09 10:50:20,330 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 1917 transitions. Word has length 80 [2021-11-09 10:50:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:20,330 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 1917 transitions. [2021-11-09 10:50:20,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 10:50:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 1917 transitions. [2021-11-09 10:50:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:20,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:20,334 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:20,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:20,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:20,546 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash -50330952, now seen corresponding path program 4 times [2021-11-09 10:50:20,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:20,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71637046] [2021-11-09 10:50:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:20,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-09 10:50:21,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:21,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71637046] [2021-11-09 10:50:21,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71637046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:21,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285642469] [2021-11-09 10:50:21,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:50:21,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:21,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:21,073 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:21,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:50:22,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:50:22,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 10:50:22,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:22,290 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 38 treesize of output 26 [2021-11-09 10:50:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 10:50:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 10:50:22,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285642469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:22,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:22,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2021-11-09 10:50:22,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213438306] [2021-11-09 10:50:22,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:50:22,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:22,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:50:22,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:50:22,422 INFO L87 Difference]: Start difference. First operand 1755 states and 1917 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:22,918 INFO L93 Difference]: Finished difference Result 2294 states and 2499 transitions. [2021-11-09 10:50:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:50:22,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:50:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:22,925 INFO L225 Difference]: With dead ends: 2294 [2021-11-09 10:50:22,925 INFO L226 Difference]: Without dead ends: 1736 [2021-11-09 10:50:22,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:50:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-11-09 10:50:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1675. [2021-11-09 10:50:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1674 states have (on average 1.0842293906810037) internal successors, (1815), 1674 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 1815 transitions. [2021-11-09 10:50:23,122 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 1815 transitions. Word has length 80 [2021-11-09 10:50:23,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:23,123 INFO L470 AbstractCegarLoop]: Abstraction has 1675 states and 1815 transitions. [2021-11-09 10:50:23,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 1815 transitions. [2021-11-09 10:50:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:23,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:23,127 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:23,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:23,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 10:50:23,328 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:23,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash -403419334, now seen corresponding path program 2 times [2021-11-09 10:50:23,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:23,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324554627] [2021-11-09 10:50:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:23,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 104 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-09 10:50:24,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:24,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324554627] [2021-11-09 10:50:24,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324554627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:24,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114112744] [2021-11-09 10:50:24,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:50:24,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:24,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:24,218 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:24,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:50:25,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:50:25,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:50:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:25,285 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 22 treesize of output 17 [2021-11-09 10:50:25,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 10:50:25,540 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 23 treesize of output 19 [2021-11-09 10:50:25,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 10:50:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-09 10:50:25,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114112744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:25,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:25,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 29 [2021-11-09 10:50:25,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074160068] [2021-11-09 10:50:25,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 10:50:25,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:25,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 10:50:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:50:25,844 INFO L87 Difference]: Start difference. First operand 1675 states and 1815 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:28,540 INFO L93 Difference]: Finished difference Result 2190 states and 2346 transitions. [2021-11-09 10:50:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:50:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:50:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:28,546 INFO L225 Difference]: With dead ends: 2190 [2021-11-09 10:50:28,546 INFO L226 Difference]: Without dead ends: 1593 [2021-11-09 10:50:28,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=476, Invalid=3306, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 10:50:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-11-09 10:50:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1405. [2021-11-09 10:50:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.0754985754985755) internal successors, (1510), 1404 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1510 transitions. [2021-11-09 10:50:28,711 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1510 transitions. Word has length 80 [2021-11-09 10:50:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:28,711 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1510 transitions. [2021-11-09 10:50:28,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1510 transitions. [2021-11-09 10:50:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:28,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:28,714 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:28,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:28,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:50:28,927 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1371588028, now seen corresponding path program 5 times [2021-11-09 10:50:28,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:28,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420414907] [2021-11-09 10:50:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:28,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 10:50:29,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:29,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420414907] [2021-11-09 10:50:29,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420414907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:29,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791479810] [2021-11-09 10:50:29,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:50:29,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:29,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:29,675 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:29,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:50:31,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 10:50:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 10:50:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:50:32,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791479810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:32,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:32,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 25 [2021-11-09 10:50:32,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919126364] [2021-11-09 10:50:32,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:50:32,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:50:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:50:32,052 INFO L87 Difference]: Start difference. First operand 1405 states and 1510 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 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 10:50:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:32,979 INFO L93 Difference]: Finished difference Result 1670 states and 1781 transitions. [2021-11-09 10:50:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:50:32,980 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 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 80 [2021-11-09 10:50:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:32,986 INFO L225 Difference]: With dead ends: 1670 [2021-11-09 10:50:32,986 INFO L226 Difference]: Without dead ends: 1648 [2021-11-09 10:50:32,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:50:32,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-11-09 10:50:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1404. [2021-11-09 10:50:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 1.075552387740556) internal successors, (1509), 1403 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1509 transitions. [2021-11-09 10:50:33,151 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1509 transitions. Word has length 80 [2021-11-09 10:50:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:33,151 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 1509 transitions. [2021-11-09 10:50:33,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 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 10:50:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1509 transitions. [2021-11-09 10:50:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:33,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:33,153 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:33,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:33,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:50:33,354 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 578456190, now seen corresponding path program 6 times [2021-11-09 10:50:33,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:33,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160949161] [2021-11-09 10:50:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:33,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-09 10:50:33,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:33,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160949161] [2021-11-09 10:50:33,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160949161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:33,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586997805] [2021-11-09 10:50:33,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:50:33,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:33,960 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:33,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:50:35,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 10:50:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:50:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:50:36,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586997805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:36,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:36,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2021-11-09 10:50:36,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047671621] [2021-11-09 10:50:36,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:50:36,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:36,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:50:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:50:36,145 INFO L87 Difference]: Start difference. First operand 1404 states and 1509 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:36,972 INFO L93 Difference]: Finished difference Result 1679 states and 1790 transitions. [2021-11-09 10:50:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:50:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:50:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:36,978 INFO L225 Difference]: With dead ends: 1679 [2021-11-09 10:50:36,978 INFO L226 Difference]: Without dead ends: 1645 [2021-11-09 10:50:36,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:50:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-11-09 10:50:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1404. [2021-11-09 10:50:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 1.0741268709907341) internal successors, (1507), 1403 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1507 transitions. [2021-11-09 10:50:37,133 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1507 transitions. Word has length 80 [2021-11-09 10:50:37,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:37,133 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 1507 transitions. [2021-11-09 10:50:37,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1507 transitions. [2021-11-09 10:50:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:37,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:37,136 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:37,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:37,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:50:37,336 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:37,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1334866174, now seen corresponding path program 7 times [2021-11-09 10:50:37,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:37,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911630658] [2021-11-09 10:50:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:37,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-09 10:50:37,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:37,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911630658] [2021-11-09 10:50:37,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911630658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:37,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398423175] [2021-11-09 10:50:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:50:37,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:37,971 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:37,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:50:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:50:39,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-09 10:50:40,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398423175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:40,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:40,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 21 [2021-11-09 10:50:40,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961214780] [2021-11-09 10:50:40,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:50:40,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:50:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:50:40,073 INFO L87 Difference]: Start difference. First operand 1404 states and 1507 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 10:50:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:40,875 INFO L93 Difference]: Finished difference Result 1682 states and 1793 transitions. [2021-11-09 10:50:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:50:40,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 80 [2021-11-09 10:50:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:40,883 INFO L225 Difference]: With dead ends: 1682 [2021-11-09 10:50:40,883 INFO L226 Difference]: Without dead ends: 1648 [2021-11-09 10:50:40,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:50:40,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-11-09 10:50:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1410. [2021-11-09 10:50:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 1.0759403832505323) internal successors, (1516), 1409 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1516 transitions. [2021-11-09 10:50:41,071 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1516 transitions. Word has length 80 [2021-11-09 10:50:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:41,071 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 1516 transitions. [2021-11-09 10:50:41,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 10:50:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1516 transitions. [2021-11-09 10:50:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:41,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:41,074 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:41,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:41,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:41,287 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:41,287 INFO L85 PathProgramCache]: Analyzing trace with hash -240624388, now seen corresponding path program 8 times [2021-11-09 10:50:41,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:41,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422424777] [2021-11-09 10:50:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:41,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:50:41,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:41,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422424777] [2021-11-09 10:50:41,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422424777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:41,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239326058] [2021-11-09 10:50:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:50:41,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:41,832 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:41,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:50:43,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:50:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:50:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-09 10:50:43,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239326058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:43,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:43,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 20 [2021-11-09 10:50:43,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447892845] [2021-11-09 10:50:43,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:50:43,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:43,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:50:43,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:50:43,877 INFO L87 Difference]: Start difference. First operand 1410 states and 1516 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:44,573 INFO L93 Difference]: Finished difference Result 1706 states and 1824 transitions. [2021-11-09 10:50:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:50:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:50:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:44,579 INFO L225 Difference]: With dead ends: 1706 [2021-11-09 10:50:44,579 INFO L226 Difference]: Without dead ends: 1672 [2021-11-09 10:50:44,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 17 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:50:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-11-09 10:50:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1414. [2021-11-09 10:50:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 1.0764331210191083) internal successors, (1521), 1413 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1521 transitions. [2021-11-09 10:50:44,763 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1521 transitions. Word has length 80 [2021-11-09 10:50:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:44,764 INFO L470 AbstractCegarLoop]: Abstraction has 1414 states and 1521 transitions. [2021-11-09 10:50:44,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1521 transitions. [2021-11-09 10:50:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:44,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:44,767 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:44,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:44,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:44,968 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1033756226, now seen corresponding path program 9 times [2021-11-09 10:50:44,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:44,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779455491] [2021-11-09 10:50:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:44,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:50:45,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:45,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779455491] [2021-11-09 10:50:45,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779455491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:45,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590253274] [2021-11-09 10:50:45,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:50:45,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:45,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:45,807 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:45,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 10:50:47,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:50:47,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:50:47,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:50:48,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590253274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:48,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:48,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2021-11-09 10:50:48,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780826847] [2021-11-09 10:50:48,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:50:48,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:50:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:50:48,263 INFO L87 Difference]: Start difference. First operand 1414 states and 1521 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:49,148 INFO L93 Difference]: Finished difference Result 1699 states and 1814 transitions. [2021-11-09 10:50:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:50:49,148 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:50:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:49,151 INFO L225 Difference]: With dead ends: 1699 [2021-11-09 10:50:49,152 INFO L226 Difference]: Without dead ends: 1668 [2021-11-09 10:50:49,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:50:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-11-09 10:50:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1413. [2021-11-09 10:50:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 1.0757790368271956) internal successors, (1519), 1412 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1519 transitions. [2021-11-09 10:50:49,319 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1519 transitions. Word has length 80 [2021-11-09 10:50:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:49,319 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 1519 transitions. [2021-11-09 10:50:49,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1519 transitions. [2021-11-09 10:50:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:50:49,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:49,322 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:49,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:49,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:49,527 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash -170203590, now seen corresponding path program 3 times [2021-11-09 10:50:49,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:49,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200007610] [2021-11-09 10:50:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:49,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-09 10:50:50,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:50,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200007610] [2021-11-09 10:50:50,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200007610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:50,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122518256] [2021-11-09 10:50:50,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:50:50,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:50,115 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:50,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 10:50:51,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 10:50:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:50:51,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:51,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:51,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2021-11-09 10:50:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,941 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 54 treesize of output 35 [2021-11-09 10:50:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:52,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:52,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 40 [2021-11-09 10:50:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:52,143 INFO L354 Elim1Store]: treesize reduction 154, result has 24.5 percent of original size [2021-11-09 10:50:52,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 75 [2021-11-09 10:50:54,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:54,474 INFO L354 Elim1Store]: treesize reduction 306, result has 30.0 percent of original size [2021-11-09 10:50:54,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 98 treesize of output 178 [2021-11-09 10:51:05,208 INFO L354 Elim1Store]: treesize reduction 118, result has 21.9 percent of original size [2021-11-09 10:51:05,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 68 treesize of output 87 [2021-11-09 10:51:05,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 10:51:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-09 10:51:05,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122518256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:05,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:05,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-11-09 10:51:05,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549076075] [2021-11-09 10:51:05,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 10:51:05,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 10:51:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=547, Unknown=3, NotChecked=0, Total=650 [2021-11-09 10:51:05,323 INFO L87 Difference]: Start difference. First operand 1413 states and 1519 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:42,784 WARN L207 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-11-09 10:51:50,947 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2021-11-09 10:51:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:57,705 INFO L93 Difference]: Finished difference Result 1646 states and 1754 transitions. [2021-11-09 10:51:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:51:57,706 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:51:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:57,708 INFO L225 Difference]: With dead ends: 1646 [2021-11-09 10:51:57,708 INFO L226 Difference]: Without dead ends: 1492 [2021-11-09 10:51:57,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=372, Invalid=2167, Unknown=11, NotChecked=0, Total=2550 [2021-11-09 10:51:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-11-09 10:51:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1390. [2021-11-09 10:51:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 1.0539956803455723) internal successors, (1464), 1389 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1464 transitions. [2021-11-09 10:51:57,894 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1464 transitions. Word has length 80 [2021-11-09 10:51:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:57,894 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 1464 transitions. [2021-11-09 10:51:57,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1464 transitions. [2021-11-09 10:51:57,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:51:57,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:57,897 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:57,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:58,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:58,106 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1859147332, now seen corresponding path program 10 times [2021-11-09 10:51:58,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:58,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265372530] [2021-11-09 10:51:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:58,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:51:58,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:58,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265372530] [2021-11-09 10:51:58,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265372530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:58,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737863069] [2021-11-09 10:51:58,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:51:58,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:58,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:58,859 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:58,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 10:52:00,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:52:00,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:52:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:52:01,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737863069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:01,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:01,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 25 [2021-11-09 10:52:01,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525661059] [2021-11-09 10:52:01,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:52:01,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:52:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:52:01,078 INFO L87 Difference]: Start difference. First operand 1390 states and 1464 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:02,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:02,355 INFO L93 Difference]: Finished difference Result 1590 states and 1662 transitions. [2021-11-09 10:52:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:52:02,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:52:02,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:02,359 INFO L225 Difference]: With dead ends: 1590 [2021-11-09 10:52:02,359 INFO L226 Difference]: Without dead ends: 1568 [2021-11-09 10:52:02,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:52:02,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-11-09 10:52:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1387. [2021-11-09 10:52:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 1.0533910533910533) internal successors, (1460), 1386 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1460 transitions. [2021-11-09 10:52:02,624 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1460 transitions. Word has length 80 [2021-11-09 10:52:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:02,624 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 1460 transitions. [2021-11-09 10:52:02,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1460 transitions. [2021-11-09 10:52:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:52:02,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:02,627 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:02,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:02,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:02,851 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:02,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1642688126, now seen corresponding path program 11 times [2021-11-09 10:52:02,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:02,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696255490] [2021-11-09 10:52:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:02,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 10:52:03,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:03,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696255490] [2021-11-09 10:52:03,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696255490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:03,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180589778] [2021-11-09 10:52:03,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:52:03,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:03,495 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:03,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 10:52:05,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 10:52:05,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:05,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:52:05,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-09 10:52:05,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180589778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:05,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:05,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 21 [2021-11-09 10:52:05,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276039070] [2021-11-09 10:52:05,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:52:05,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:52:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:52:05,908 INFO L87 Difference]: Start difference. First operand 1387 states and 1460 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 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 10:52:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:06,704 INFO L93 Difference]: Finished difference Result 1563 states and 1635 transitions. [2021-11-09 10:52:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:52:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 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 80 [2021-11-09 10:52:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:06,707 INFO L225 Difference]: With dead ends: 1563 [2021-11-09 10:52:06,707 INFO L226 Difference]: Without dead ends: 1541 [2021-11-09 10:52:06,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:52:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-11-09 10:52:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1384. [2021-11-09 10:52:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.0527838033261028) internal successors, (1456), 1383 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1456 transitions. [2021-11-09 10:52:06,901 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1456 transitions. Word has length 80 [2021-11-09 10:52:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:06,902 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1456 transitions. [2021-11-09 10:52:06,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 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 10:52:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1456 transitions. [2021-11-09 10:52:06,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:52:06,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:06,904 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:06,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:07,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 10:52:07,104 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:07,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1895869186, now seen corresponding path program 12 times [2021-11-09 10:52:07,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:07,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196106717] [2021-11-09 10:52:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:07,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-09 10:52:07,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:07,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196106717] [2021-11-09 10:52:07,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196106717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:07,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116810125] [2021-11-09 10:52:07,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:52:07,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:07,776 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:07,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 10:52:09,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 10:52:09,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:09,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:52:09,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-09 10:52:10,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116810125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:10,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:10,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 22 [2021-11-09 10:52:10,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911699699] [2021-11-09 10:52:10,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:52:10,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:10,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:52:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:52:10,287 INFO L87 Difference]: Start difference. First operand 1384 states and 1456 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:10,981 INFO L93 Difference]: Finished difference Result 1563 states and 1633 transitions. [2021-11-09 10:52:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:52:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 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 80 [2021-11-09 10:52:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:10,983 INFO L225 Difference]: With dead ends: 1563 [2021-11-09 10:52:10,983 INFO L226 Difference]: Without dead ends: 1541 [2021-11-09 10:52:10,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:52:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-11-09 10:52:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1383. [2021-11-09 10:52:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.052821997105644) internal successors, (1455), 1382 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1455 transitions. [2021-11-09 10:52:11,193 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1455 transitions. Word has length 80 [2021-11-09 10:52:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:11,193 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 1455 transitions. [2021-11-09 10:52:11,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1455 transitions. [2021-11-09 10:52:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:52:11,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:11,195 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:11,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:11,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 10:52:11,396 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash 823607548, now seen corresponding path program 13 times [2021-11-09 10:52:11,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:11,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874399722] [2021-11-09 10:52:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:11,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 10:52:11,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:11,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874399722] [2021-11-09 10:52:11,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874399722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:11,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942870827] [2021-11-09 10:52:11,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:52:11,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:11,990 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:11,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 10:52:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:52:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:52:14,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942870827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:14,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:14,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 21 [2021-11-09 10:52:14,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392647889] [2021-11-09 10:52:14,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:52:14,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:52:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:52:14,253 INFO L87 Difference]: Start difference. First operand 1383 states and 1455 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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 10:52:15,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:15,043 INFO L93 Difference]: Finished difference Result 1574 states and 1642 transitions. [2021-11-09 10:52:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:52:15,043 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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) Word has length 80 [2021-11-09 10:52:15,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:15,045 INFO L225 Difference]: With dead ends: 1574 [2021-11-09 10:52:15,046 INFO L226 Difference]: Without dead ends: 1552 [2021-11-09 10:52:15,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:52:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-11-09 10:52:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1377. [2021-11-09 10:52:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 1.0515988372093024) internal successors, (1447), 1376 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 1447 transitions. [2021-11-09 10:52:15,264 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 1447 transitions. Word has length 80 [2021-11-09 10:52:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:15,265 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 1447 transitions. [2021-11-09 10:52:15,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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 10:52:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 1447 transitions. [2021-11-09 10:52:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:52:15,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:15,268 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:15,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:15,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 10:52:15,479 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:15,479 INFO L85 PathProgramCache]: Analyzing trace with hash 30475710, now seen corresponding path program 14 times [2021-11-09 10:52:15,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:15,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576839630] [2021-11-09 10:52:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:15,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 10:52:16,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:16,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576839630] [2021-11-09 10:52:16,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576839630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:16,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380431049] [2021-11-09 10:52:16,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:52:16,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:16,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:16,355 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:16,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 10:52:18,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:52:18,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:52:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:52:18,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380431049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:18,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:18,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 24 [2021-11-09 10:52:18,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992076060] [2021-11-09 10:52:18,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:52:18,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:52:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:52:18,892 INFO L87 Difference]: Start difference. First operand 1377 states and 1447 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:19,878 INFO L93 Difference]: Finished difference Result 1575 states and 1642 transitions. [2021-11-09 10:52:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:52:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:52:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:19,880 INFO L225 Difference]: With dead ends: 1575 [2021-11-09 10:52:19,880 INFO L226 Difference]: Without dead ends: 1553 [2021-11-09 10:52:19,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 73 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:52:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-11-09 10:52:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1371. [2021-11-09 10:52:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.0503649635036496) internal successors, (1439), 1370 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1439 transitions. [2021-11-09 10:52:20,062 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1439 transitions. Word has length 80 [2021-11-09 10:52:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:20,062 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 1439 transitions. [2021-11-09 10:52:20,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1439 transitions. [2021-11-09 10:52:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:52:20,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:20,064 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:20,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:20,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:20,265 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:20,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:20,265 INFO L85 PathProgramCache]: Analyzing trace with hash 242043902, now seen corresponding path program 15 times [2021-11-09 10:52:20,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:20,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440450903] [2021-11-09 10:52:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:20,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-09 10:52:20,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:20,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440450903] [2021-11-09 10:52:20,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440450903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:20,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565911324] [2021-11-09 10:52:20,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:52:20,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:20,943 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:20,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 10:52:22,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:52:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:52:22,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-09 10:52:23,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565911324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:23,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:23,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 24 [2021-11-09 10:52:23,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847089753] [2021-11-09 10:52:23,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:52:23,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:52:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:52:23,673 INFO L87 Difference]: Start difference. First operand 1371 states and 1439 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:24,595 INFO L93 Difference]: Finished difference Result 1574 states and 1638 transitions. [2021-11-09 10:52:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:52:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:52:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:24,598 INFO L225 Difference]: With dead ends: 1574 [2021-11-09 10:52:24,598 INFO L226 Difference]: Without dead ends: 1552 [2021-11-09 10:52:24,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:52:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-11-09 10:52:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1368. [2021-11-09 10:52:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 1.049743964886613) internal successors, (1435), 1367 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1435 transitions. [2021-11-09 10:52:24,785 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1435 transitions. Word has length 80 [2021-11-09 10:52:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:24,785 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1435 transitions. [2021-11-09 10:52:24,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1435 transitions. [2021-11-09 10:52:24,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:52:24,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:24,788 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:24,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:25,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 10:52:25,003 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash 205322048, now seen corresponding path program 16 times [2021-11-09 10:52:25,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:25,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966200035] [2021-11-09 10:52:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:25,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 10:52:25,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:25,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966200035] [2021-11-09 10:52:25,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966200035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:25,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781055825] [2021-11-09 10:52:25,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:52:25,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:25,751 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:25,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 10:52:27,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:52:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:27,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:52:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 10:52:28,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781055825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:28,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:28,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-11-09 10:52:28,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376687592] [2021-11-09 10:52:28,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:52:28,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:52:28,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:52:28,508 INFO L87 Difference]: Start difference. First operand 1368 states and 1435 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 10:52:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:29,186 INFO L93 Difference]: Finished difference Result 1562 states and 1626 transitions. [2021-11-09 10:52:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:52:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 80 [2021-11-09 10:52:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:29,188 INFO L225 Difference]: With dead ends: 1562 [2021-11-09 10:52:29,189 INFO L226 Difference]: Without dead ends: 1540 [2021-11-09 10:52:29,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 12 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:52:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-11-09 10:52:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1367. [2021-11-09 10:52:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 1.0497803806734993) internal successors, (1434), 1366 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1434 transitions. [2021-11-09 10:52:29,403 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1434 transitions. Word has length 80 [2021-11-09 10:52:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:29,403 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 1434 transitions. [2021-11-09 10:52:29,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 10:52:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1434 transitions. [2021-11-09 10:52:29,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:52:29,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:29,405 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:29,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:29,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 10:52:29,607 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:29,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1370168514, now seen corresponding path program 17 times [2021-11-09 10:52:29,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:29,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020745452] [2021-11-09 10:52:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:29,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 10:52:30,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:30,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020745452] [2021-11-09 10:52:30,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020745452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:30,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702656968] [2021-11-09 10:52:30,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:52:30,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:30,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:30,451 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:30,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 10:52:32,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 10:52:32,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:32,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:52:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 10:52:33,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702656968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:33,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:33,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 24 [2021-11-09 10:52:33,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550964404] [2021-11-09 10:52:33,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:52:33,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:52:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:52:33,484 INFO L87 Difference]: Start difference. First operand 1367 states and 1434 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:34,511 INFO L93 Difference]: Finished difference Result 1570 states and 1632 transitions. [2021-11-09 10:52:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 10:52:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:52:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:34,515 INFO L225 Difference]: With dead ends: 1570 [2021-11-09 10:52:34,515 INFO L226 Difference]: Without dead ends: 1548 [2021-11-09 10:52:34,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:52:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-11-09 10:52:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1361. [2021-11-09 10:52:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 1.048529411764706) internal successors, (1426), 1360 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 1426 transitions. [2021-11-09 10:52:34,701 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 1426 transitions. Word has length 80 [2021-11-09 10:52:34,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:34,702 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 1426 transitions. [2021-11-09 10:52:34,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 1426 transitions. [2021-11-09 10:52:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:52:34,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:34,705 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:34,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:34,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:52:34,905 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2131666944, now seen corresponding path program 1 times [2021-11-09 10:52:34,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:34,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580272286] [2021-11-09 10:52:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:34,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-09 10:52:35,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:35,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580272286] [2021-11-09 10:52:35,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580272286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:35,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863926999] [2021-11-09 10:52:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:35,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:35,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:35,847 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:35,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 10:52:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:52:37,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-09 10:52:38,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863926999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:38,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:38,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 28 [2021-11-09 10:52:38,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262974759] [2021-11-09 10:52:38,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:52:38,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:38,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:52:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:52:38,691 INFO L87 Difference]: Start difference. First operand 1361 states and 1426 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:39,788 INFO L93 Difference]: Finished difference Result 1549 states and 1609 transitions. [2021-11-09 10:52:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:52:39,789 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:52:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:39,792 INFO L225 Difference]: With dead ends: 1549 [2021-11-09 10:52:39,792 INFO L226 Difference]: Without dead ends: 1527 [2021-11-09 10:52:39,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:52:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-11-09 10:52:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1355. [2021-11-09 10:52:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 1.0472673559822747) internal successors, (1418), 1354 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1418 transitions. [2021-11-09 10:52:40,077 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1418 transitions. Word has length 80 [2021-11-09 10:52:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:40,077 INFO L470 AbstractCegarLoop]: Abstraction has 1355 states and 1418 transitions. [2021-11-09 10:52:40,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1418 transitions. [2021-11-09 10:52:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:52:40,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:40,080 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:40,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-09 10:52:40,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 10:52:40,301 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:40,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2039411198, now seen corresponding path program 6 times [2021-11-09 10:52:40,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:40,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025411391] [2021-11-09 10:52:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:40,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-09 10:52:40,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:40,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025411391] [2021-11-09 10:52:40,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025411391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:40,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585045583] [2021-11-09 10:52:40,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:52:40,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:40,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:40,387 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:40,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 10:52:42,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 10:52:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:52:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-09 10:52:42,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585045583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:42,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:42,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2021-11-09 10:52:42,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055444036] [2021-11-09 10:52:42,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:52:42,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:52:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:52:42,815 INFO L87 Difference]: Start difference. First operand 1355 states and 1418 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:42,976 INFO L93 Difference]: Finished difference Result 1355 states and 1418 transitions. [2021-11-09 10:52:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:52:42,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 10:52:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:42,976 INFO L225 Difference]: With dead ends: 1355 [2021-11-09 10:52:42,976 INFO L226 Difference]: Without dead ends: 0 [2021-11-09 10:52:42,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:52:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-09 10:52:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-09 10:52:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-09 10:52:42,978 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2021-11-09 10:52:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:42,978 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 10:52:42,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-09 10:52:42,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-09 10:52:42,981 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:52:43,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:43,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ed72507-91a3-481d-8958-b44f71b15335/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:43,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-09 10:52:43,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:52:46,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:52:46,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:52:46,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:52:48,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:52:48,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:52:48,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:52:50,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:53:32,399 WARN L207 SmtUtils]: Spent 42.37 s on a formula simplification. DAG size of input: 3094 DAG size of output: 2574 [2021-11-09 10:53:32,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:53:43,595 WARN L207 SmtUtils]: Spent 11.18 s on a formula simplification. DAG size of input: 330 DAG size of output: 86 [2021-11-09 10:53:57,183 WARN L207 SmtUtils]: Spent 13.58 s on a formula simplification. DAG size of input: 276 DAG size of output: 206 [2021-11-09 10:54:04,839 WARN L207 SmtUtils]: Spent 7.65 s on a formula simplification. DAG size of input: 189 DAG size of output: 152 [2021-11-09 10:58:40,107 WARN L207 SmtUtils]: Spent 4.59 m on a formula simplification. DAG size of input: 619 DAG size of output: 545 [2021-11-09 10:58:53,662 WARN L207 SmtUtils]: Spent 13.55 s on a formula simplification. DAG size of input: 234 DAG size of output: 177