./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg20-2.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_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/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_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg20-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/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_4f0773fd-2910-4941-aa58-f4172d6ed66e/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 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:30:36,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:30:36,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:30:36,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:30:36,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:30:36,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:30:36,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:30:36,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:30:36,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:30:36,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:30:36,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:30:36,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:30:36,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:30:36,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:30:36,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:30:36,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:30:36,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:30:36,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:30:36,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:30:36,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:30:36,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:30:36,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:30:36,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:30:36,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:30:36,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:30:36,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:30:36,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:30:36,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:30:36,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:30:36,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:30:36,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:30:36,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:30:36,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:30:36,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:30:36,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:30:36,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:30:36,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:30:36,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:30:36,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:30:36,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:30:36,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:30:36,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:30:36,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:30:36,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:30:36,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:30:36,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:30:36,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:30:36,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:30:36,785 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:30:36,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:30:36,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:30:36,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:30:36,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:30:36,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:30:36,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:30:36,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:30:36,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:30:36,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:30:36,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:30:36,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:30:36,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:30:36,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:30:36,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:30:36,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:30:36,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:36,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:30:36,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:30:36,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:30:36,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:30:36,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:30:36,792 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:30:36,793 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:30:36,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:30:36,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:30:36,794 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_4f0773fd-2910-4941-aa58-f4172d6ed66e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 [2021-11-09 08:30:37,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:30:37,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:30:37,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:30:37,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:30:37,134 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:30:37,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/reducercommutativity/avg20-2.i [2021-11-09 08:30:37,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/data/7c02f8770/5b2f1e5da86a4b75967ee3eca6f26a14/FLAGbd123e707 [2021-11-09 08:30:37,692 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:30:37,693 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/sv-benchmarks/c/reducercommutativity/avg20-2.i [2021-11-09 08:30:37,700 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/data/7c02f8770/5b2f1e5da86a4b75967ee3eca6f26a14/FLAGbd123e707 [2021-11-09 08:30:38,072 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/data/7c02f8770/5b2f1e5da86a4b75967ee3eca6f26a14 [2021-11-09 08:30:38,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:30:38,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:30:38,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:38,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:30:38,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:30:38,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617fa60d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38, skipping insertion in model container [2021-11-09 08:30:38,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:30:38,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:30:38,345 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_4f0773fd-2910-4941-aa58-f4172d6ed66e/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2021-11-09 08:30:38,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:38,360 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:30:38,388 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_4f0773fd-2910-4941-aa58-f4172d6ed66e/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2021-11-09 08:30:38,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:38,402 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:30:38,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38 WrapperNode [2021-11-09 08:30:38,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:38,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:30:38,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:30:38,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:30:38,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:30:38,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:30:38,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:30:38,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:30:38,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:30:38,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:30:38,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:30:38,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:30:38,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (1/1) ... [2021-11-09 08:30:38,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:38,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:38,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:30:38,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:30:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:30:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:30:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:30:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:30:38,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:30:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:30:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:30:38,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:30:38,978 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-09 08:30:38,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:38 BoogieIcfgContainer [2021-11-09 08:30:38,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:30:38,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:30:38,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:30:38,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:30:38,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:30:38" (1/3) ... [2021-11-09 08:30:38,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7046722f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:38, skipping insertion in model container [2021-11-09 08:30:38,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:38" (2/3) ... [2021-11-09 08:30:38,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7046722f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:38, skipping insertion in model container [2021-11-09 08:30:38,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:38" (3/3) ... [2021-11-09 08:30:38,989 INFO L111 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2021-11-09 08:30:38,994 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:30:38,995 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:30:39,040 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:30:39,047 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 08:30:39,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:30:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 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 08:30:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:30:39,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:39,068 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 08:30:39,069 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-11-09 08:30:39,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:39,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993627563] [2021-11-09 08:30:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:39,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:39,267 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 08:30:39,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:39,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993627563] [2021-11-09 08:30:39,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993627563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:39,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:39,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:39,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071480897] [2021-11-09 08:30:39,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:39,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:39,293 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 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) 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 08:30:39,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:39,319 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-09 08:30:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:39,321 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 08:30:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:39,329 INFO L225 Difference]: With dead ends: 52 [2021-11-09 08:30:39,329 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 08:30:39,332 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 08:30:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 08:30:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-09 08:30:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-09 08:30:39,363 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-11-09 08:30:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:39,364 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-09 08:30:39,364 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 08:30:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-09 08:30:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:30:39,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:39,366 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 08:30:39,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:30:39,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:39,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:39,367 INFO L85 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-11-09 08:30:39,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:39,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465261772] [2021-11-09 08:30:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:39,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:39,423 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 08:30:39,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:39,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465261772] [2021-11-09 08:30:39,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465261772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:39,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074536875] [2021-11-09 08:30:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:39,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:39,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:39,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:30:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:39,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:30:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:39,646 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 08:30:39,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074536875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:39,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:30:39,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 08:30:39,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310989294] [2021-11-09 08:30:39,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:39,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:39,650 INFO L87 Difference]: Start difference. First operand 24 states and 28 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 08:30:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:39,679 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-09 08:30:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:39,680 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 08:30:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:39,681 INFO L225 Difference]: With dead ends: 46 [2021-11-09 08:30:39,681 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 08:30:39,682 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 08:30:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 08:30:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-11-09 08:30:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-09 08:30:39,687 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-11-09 08:30:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:39,688 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-09 08:30:39,688 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 08:30:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-09 08:30:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:30:39,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:39,689 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:39,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:39,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:39,909 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:39,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-11-09 08:30:39,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:39,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765260822] [2021-11-09 08:30:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:39,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:40,017 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 08:30:40,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:40,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765260822] [2021-11-09 08:30:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765260822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:40,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960635745] [2021-11-09 08:30:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:40,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:40,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:40,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:30:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:30:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:40,231 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 08:30:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960635745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:40,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:30:40,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 08:30:40,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357591489] [2021-11-09 08:30:40,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:40,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:40,239 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:40,260 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-09 08:30:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:40,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 08:30:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:40,263 INFO L225 Difference]: With dead ends: 38 [2021-11-09 08:30:40,263 INFO L226 Difference]: Without dead ends: 29 [2021-11-09 08:30:40,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 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 08:30:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-09 08:30:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-09 08:30:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-09 08:30:40,271 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-09 08:30:40,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:40,272 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-09 08:30:40,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-09 08:30:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:30:40,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:40,273 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:40,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:40,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:40,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-11-09 08:30:40,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:40,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517954079] [2021-11-09 08:30:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:40,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:40,574 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 08:30:40,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:40,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517954079] [2021-11-09 08:30:40,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517954079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:40,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862140901] [2021-11-09 08:30:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:40,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:40,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:40,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:40,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:30:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:40,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:40,823 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 08:30:40,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862140901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:40,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:40,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:30:40,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74582047] [2021-11-09 08:30:40,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:40,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:40,830 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:40,873 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-09 08:30:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:40,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 08:30:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:40,875 INFO L225 Difference]: With dead ends: 54 [2021-11-09 08:30:40,875 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 08:30:40,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 08:30:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 08:30:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-11-09 08:30:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-09 08:30:40,881 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-11-09 08:30:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:40,882 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-09 08:30:40,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-09 08:30:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 08:30:40,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:40,883 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:40,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:41,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:41,110 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-11-09 08:30:41,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:41,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692523773] [2021-11-09 08:30:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:41,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:41,190 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 08:30:41,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:41,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692523773] [2021-11-09 08:30:41,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692523773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:41,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705089770] [2021-11-09 08:30:41,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:30:41,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:41,195 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:41,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:30:41,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:41,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:41,399 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 08:30:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705089770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:41,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:41,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-09 08:30:41,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600438166] [2021-11-09 08:30:41,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:30:41,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:30:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:30:41,419 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 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 08:30:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:41,500 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-09 08:30:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:30:41,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 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 29 [2021-11-09 08:30:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:41,505 INFO L225 Difference]: With dead ends: 61 [2021-11-09 08:30:41,506 INFO L226 Difference]: Without dead ends: 42 [2021-11-09 08:30:41,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:30:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-09 08:30:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-09 08:30:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:41,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-09 08:30:41,527 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-11-09 08:30:41,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:41,527 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-09 08:30:41,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 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 08:30:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-09 08:30:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:30:41,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:41,531 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:41,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:41,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:41,736 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:41,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-11-09 08:30:41,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:41,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832898729] [2021-11-09 08:30:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:41,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:30:41,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:41,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832898729] [2021-11-09 08:30:41,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832898729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:41,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882327417] [2021-11-09 08:30:41,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:30:41,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:41,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:41,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:41,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:30:42,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:30:42,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:30:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:30:42,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882327417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:42,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:42,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 08:30:42,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392367495] [2021-11-09 08:30:42,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:30:42,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:42,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:30:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:30:42,155 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:42,227 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-11-09 08:30:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:42,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:30:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:42,229 INFO L225 Difference]: With dead ends: 81 [2021-11-09 08:30:42,229 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 08:30:42,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:30:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 08:30:42,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-09 08:30:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-09 08:30:42,246 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-11-09 08:30:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:42,246 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-09 08:30:42,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-09 08:30:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:30:42,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:42,249 INFO L513 BasicCegarLoop]: trace histogram [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 08:30:42,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:30:42,463 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2021-11-09 08:30:42,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:42,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509852499] [2021-11-09 08:30:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:42,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 08:30:42,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:42,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509852499] [2021-11-09 08:30:42,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509852499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:42,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150376229] [2021-11-09 08:30:42,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:30:42,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:42,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:42,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:30:42,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:30:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:42,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 08:30:42,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150376229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:42,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:42,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 08:30:42,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875330320] [2021-11-09 08:30:42,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:30:42,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:30:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:42,777 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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 08:30:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:42,796 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-09 08:30:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:30:42,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) Word has length 45 [2021-11-09 08:30:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:42,797 INFO L225 Difference]: With dead ends: 86 [2021-11-09 08:30:42,797 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 08:30:42,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 08:30:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 08:30:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-11-09 08:30:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-09 08:30:42,803 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2021-11-09 08:30:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:42,803 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-09 08:30:42,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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 08:30:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-09 08:30:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:30:42,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:42,804 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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 08:30:42,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 08:30:43,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:43,021 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:43,021 INFO L85 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2021-11-09 08:30:43,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:43,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577412218] [2021-11-09 08:30:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:43,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 08:30:43,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:43,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577412218] [2021-11-09 08:30:43,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577412218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:43,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183571758] [2021-11-09 08:30:43,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:30:43,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:43,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:43,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:30:43,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:30:43,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:43,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:30:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183571758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:43,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:43,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-09 08:30:43,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791208486] [2021-11-09 08:30:43,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:30:43,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:43,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:30:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:43,437 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:43,529 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-11-09 08:30:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:30:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 08:30:43,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:43,532 INFO L225 Difference]: With dead ends: 97 [2021-11-09 08:30:43,532 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 08:30:43,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 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 08:30:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 08:30:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-11-09 08:30:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-09 08:30:43,547 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2021-11-09 08:30:43,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:43,547 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-09 08:30:43,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-09 08:30:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:30:43,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:43,549 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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 08:30:43,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:43,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:43,751 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2021-11-09 08:30:43,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:43,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775324948] [2021-11-09 08:30:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:43,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-09 08:30:43,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:43,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775324948] [2021-11-09 08:30:43,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775324948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:43,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957965065] [2021-11-09 08:30:43,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:30:43,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:43,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:43,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:43,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:30:44,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:30:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:30:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 08:30:44,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957965065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:44,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:44,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-09 08:30:44,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472553798] [2021-11-09 08:30:44,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:30:44,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:30:44,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:44,317 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:44,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:44,363 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-09 08:30:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:30:44,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-09 08:30:44,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:44,365 INFO L225 Difference]: With dead ends: 105 [2021-11-09 08:30:44,365 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:30:44,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:30:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-09 08:30:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 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 08:30:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-09 08:30:44,371 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2021-11-09 08:30:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:44,371 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-09 08:30:44,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-09 08:30:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:30:44,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:44,373 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:44,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:44,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:44,586 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2021-11-09 08:30:44,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:44,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326425628] [2021-11-09 08:30:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:44,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 08:30:44,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:44,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326425628] [2021-11-09 08:30:44,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326425628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:44,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790084446] [2021-11-09 08:30:44,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:30:44,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:44,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:44,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:30:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:44,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:30:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 08:30:44,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790084446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:44,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:44,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 08:30:44,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028075388] [2021-11-09 08:30:44,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:30:44,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:44,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:30:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:44,996 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 08:30:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:45,023 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-11-09 08:30:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:30:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-09 08:30:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:45,024 INFO L225 Difference]: With dead ends: 108 [2021-11-09 08:30:45,025 INFO L226 Difference]: Without dead ends: 63 [2021-11-09 08:30:45,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-09 08:30:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-09 08:30:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 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 08:30:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-11-09 08:30:45,030 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2021-11-09 08:30:45,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:45,031 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-11-09 08:30:45,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 08:30:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-11-09 08:30:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:30:45,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:45,032 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:45,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:45,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:45,247 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2021-11-09 08:30:45,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:45,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352931061] [2021-11-09 08:30:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:45,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 08:30:45,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:45,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352931061] [2021-11-09 08:30:45,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352931061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:45,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361349653] [2021-11-09 08:30:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:30:45,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:45,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:45,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:30:45,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:45,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:45,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:30:45,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 08:30:45,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361349653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:45,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:45,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 08:30:45,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874850523] [2021-11-09 08:30:45,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:30:45,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:45,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:30:45,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:45,688 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:45,716 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-11-09 08:30:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:30:45,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 08:30:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:45,717 INFO L225 Difference]: With dead ends: 110 [2021-11-09 08:30:45,717 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 08:30:45,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 08:30:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-09 08:30:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 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 08:30:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-11-09 08:30:45,723 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2021-11-09 08:30:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:45,723 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-11-09 08:30:45,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-11-09 08:30:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:30:45,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:45,725 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:45,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:45,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:30:45,935 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2021-11-09 08:30:45,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:45,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79469842] [2021-11-09 08:30:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:45,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-09 08:30:46,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:46,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79469842] [2021-11-09 08:30:46,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79469842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:46,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101118258] [2021-11-09 08:30:46,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:30:46,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:46,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:46,033 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:46,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:30:46,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:30:46,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-09 08:30:46,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101118258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:46,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:46,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-11-09 08:30:46,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854201743] [2021-11-09 08:30:46,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:30:46,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:46,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:30:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:30:46,450 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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 08:30:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:46,519 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-11-09 08:30:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:30:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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 63 [2021-11-09 08:30:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:46,522 INFO L225 Difference]: With dead ends: 115 [2021-11-09 08:30:46,523 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 08:30:46,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:30:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 08:30:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-11-09 08:30:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 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 08:30:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-11-09 08:30:46,543 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2021-11-09 08:30:46,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:46,544 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-11-09 08:30:46,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 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 08:30:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-11-09 08:30:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 08:30:46,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:46,550 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:46,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:46,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 08:30:46,763 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2021-11-09 08:30:46,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:46,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21614006] [2021-11-09 08:30:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:46,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:46,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:46,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21614006] [2021-11-09 08:30:46,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21614006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:46,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589030503] [2021-11-09 08:30:46,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:30:46,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:46,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:46,901 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:46,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:30:47,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:30:47,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:47,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:30:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:47,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589030503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:47,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:47,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 08:30:47,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192888446] [2021-11-09 08:30:47,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:30:47,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:30:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:30:47,281 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 08:30:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:47,319 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-11-09 08:30:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:30:47,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 67 [2021-11-09 08:30:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:47,320 INFO L225 Difference]: With dead ends: 118 [2021-11-09 08:30:47,320 INFO L226 Difference]: Without dead ends: 71 [2021-11-09 08:30:47,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:30:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-09 08:30:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-09 08:30:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-11-09 08:30:47,325 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2021-11-09 08:30:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:47,326 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-11-09 08:30:47,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 08:30:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-11-09 08:30:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:30:47,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:47,327 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:47,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:47,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:30:47,555 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2021-11-09 08:30:47,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:47,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262554026] [2021-11-09 08:30:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:47,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:47,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:47,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262554026] [2021-11-09 08:30:47,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262554026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:47,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903346203] [2021-11-09 08:30:47,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:30:47,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:47,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:47,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:47,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:30:48,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-09 08:30:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:48,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:30:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:48,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903346203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:48,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:48,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 08:30:48,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670417874] [2021-11-09 08:30:48,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:30:48,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:30:48,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:30:48,293 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:48,335 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-11-09 08:30:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:30:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 08:30:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:48,336 INFO L225 Difference]: With dead ends: 120 [2021-11-09 08:30:48,336 INFO L226 Difference]: Without dead ends: 73 [2021-11-09 08:30:48,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:30:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-09 08:30:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-09 08:30:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 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 08:30:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-11-09 08:30:48,341 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2021-11-09 08:30:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:48,342 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-11-09 08:30:48,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-11-09 08:30:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:30:48,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:48,343 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:48,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:48,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:30:48,575 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2021-11-09 08:30:48,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:48,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578559263] [2021-11-09 08:30:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:48,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:30:48,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:48,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578559263] [2021-11-09 08:30:48,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578559263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:48,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818191970] [2021-11-09 08:30:48,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:30:48,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:48,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:48,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:48,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:30:49,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 08:30:49,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:49,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:30:49,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 08:30:49,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818191970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:49,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:49,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-11-09 08:30:49,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690564304] [2021-11-09 08:30:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:30:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:30:49,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:30:49,766 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:49,832 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-11-09 08:30:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:30:49,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 08:30:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:49,834 INFO L225 Difference]: With dead ends: 125 [2021-11-09 08:30:49,834 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 08:30:49,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:30:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 08:30:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-11-09 08:30:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-09 08:30:49,838 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2021-11-09 08:30:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:49,838 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-09 08:30:49,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-09 08:30:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:30:49,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:49,842 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:49,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:50,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:50,056 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:50,056 INFO L85 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2021-11-09 08:30:50,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:50,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791685702] [2021-11-09 08:30:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:50,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 08:30:50,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:50,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791685702] [2021-11-09 08:30:50,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791685702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:50,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056192624] [2021-11-09 08:30:50,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:30:50,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:50,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:50,206 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:30:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:50,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:30:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 08:30:50,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056192624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:50,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:50,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 08:30:50,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095192582] [2021-11-09 08:30:50,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:30:50,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:50,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:30:50,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:30:50,692 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:50,737 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-11-09 08:30:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:30:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 08:30:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:50,738 INFO L225 Difference]: With dead ends: 128 [2021-11-09 08:30:50,739 INFO L226 Difference]: Without dead ends: 79 [2021-11-09 08:30:50,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:30:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-09 08:30:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-11-09 08:30:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-09 08:30:50,745 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2021-11-09 08:30:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:50,745 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-09 08:30:50,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-09 08:30:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 08:30:50,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:50,747 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:50,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:50,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:50,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:50,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2021-11-09 08:30:50,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:50,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868012113] [2021-11-09 08:30:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:50,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 08:30:51,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:51,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868012113] [2021-11-09 08:30:51,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868012113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:51,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959419948] [2021-11-09 08:30:51,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:30:51,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:51,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:51,167 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:51,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:30:51,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:51,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:30:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 08:30:51,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959419948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:51,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:51,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 08:30:51,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163114269] [2021-11-09 08:30:51,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:30:51,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:30:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:30:51,616 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 08:30:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:51,655 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-11-09 08:30:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:30:51,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) Word has length 77 [2021-11-09 08:30:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:51,657 INFO L225 Difference]: With dead ends: 130 [2021-11-09 08:30:51,657 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 08:30:51,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:30:51,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 08:30:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-09 08:30:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 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 08:30:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-11-09 08:30:51,662 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2021-11-09 08:30:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:51,662 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-11-09 08:30:51,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 08:30:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-11-09 08:30:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 08:30:51,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:51,663 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:51,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:51,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:30:51,884 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2021-11-09 08:30:51,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:51,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723761666] [2021-11-09 08:30:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:51,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 08:30:52,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:52,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723761666] [2021-11-09 08:30:52,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723761666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:52,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188982340] [2021-11-09 08:30:52,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:30:52,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:52,074 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:52,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:30:52,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:30:52,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:52,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:30:52,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-09 08:30:52,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188982340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:52,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:52,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-11-09 08:30:52,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289494732] [2021-11-09 08:30:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:30:52,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:30:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:30:52,689 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:52,802 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-11-09 08:30:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:30:52,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 08:30:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:52,804 INFO L225 Difference]: With dead ends: 141 [2021-11-09 08:30:52,804 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 08:30:52,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:30:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 08:30:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-11-09 08:30:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-11-09 08:30:52,808 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2021-11-09 08:30:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:52,808 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-11-09 08:30:52,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-11-09 08:30:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 08:30:52,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:52,810 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:52,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:53,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:30:53,010 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2021-11-09 08:30:53,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:53,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903421054] [2021-11-09 08:30:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:53,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 08:30:53,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:53,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903421054] [2021-11-09 08:30:53,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903421054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:53,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513291630] [2021-11-09 08:30:53,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:30:53,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:53,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:53,202 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:53,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:30:53,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:30:53,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:30:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 08:30:53,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513291630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:53,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:53,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 08:30:53,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422822815] [2021-11-09 08:30:53,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:30:53,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:53,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:30:53,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:30:53,727 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 08:30:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:53,770 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-11-09 08:30:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:30:53,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 87 [2021-11-09 08:30:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:53,772 INFO L225 Difference]: With dead ends: 146 [2021-11-09 08:30:53,772 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 08:30:53,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:30:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 08:30:53,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-11-09 08:30:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-11-09 08:30:53,777 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2021-11-09 08:30:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:53,777 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-11-09 08:30:53,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 08:30:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-11-09 08:30:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 08:30:53,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:53,779 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:53,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:54,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:54,007 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2021-11-09 08:30:54,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:54,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837151924] [2021-11-09 08:30:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:54,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 08:30:54,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:54,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837151924] [2021-11-09 08:30:54,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837151924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:54,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345346564] [2021-11-09 08:30:54,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:30:54,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:54,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:54,239 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:54,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:30:55,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-09 08:30:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:30:55,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 08:30:55,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345346564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:55,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:55,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 08:30:55,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747002768] [2021-11-09 08:30:55,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:30:55,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:30:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:30:55,365 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 08:30:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:55,411 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-11-09 08:30:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:30:55,412 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 89 [2021-11-09 08:30:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:55,413 INFO L225 Difference]: With dead ends: 148 [2021-11-09 08:30:55,413 INFO L226 Difference]: Without dead ends: 93 [2021-11-09 08:30:55,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:30:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-09 08:30:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-11-09 08:30:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-11-09 08:30:55,417 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2021-11-09 08:30:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:55,418 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-11-09 08:30:55,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 08:30:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-11-09 08:30:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 08:30:55,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:55,419 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:55,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:55,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:55,635 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2021-11-09 08:30:55,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:55,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313406315] [2021-11-09 08:30:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:55,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 08:30:55,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:55,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313406315] [2021-11-09 08:30:55,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313406315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:55,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368408456] [2021-11-09 08:30:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:30:55,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:55,858 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:55,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:30:56,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 08:30:56,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:30:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-09 08:30:56,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368408456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:56,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:56,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-11-09 08:30:56,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827871108] [2021-11-09 08:30:56,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 08:30:56,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:56,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 08:30:56,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:30:56,836 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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 08:30:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:56,967 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-11-09 08:30:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:30:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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 91 [2021-11-09 08:30:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:56,968 INFO L225 Difference]: With dead ends: 159 [2021-11-09 08:30:56,968 INFO L226 Difference]: Without dead ends: 104 [2021-11-09 08:30:56,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:30:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-09 08:30:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-11-09 08:30:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-11-09 08:30:56,973 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2021-11-09 08:30:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:56,974 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-11-09 08:30:56,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 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 08:30:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-11-09 08:30:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-09 08:30:56,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:56,976 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:57,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:57,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 08:30:57,187 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:57,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2021-11-09 08:30:57,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:57,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849519936] [2021-11-09 08:30:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:57,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-09 08:30:57,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:57,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849519936] [2021-11-09 08:30:57,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849519936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:57,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209584317] [2021-11-09 08:30:57,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:30:57,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:57,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:57,467 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:57,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:30:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:30:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-09 08:30:58,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209584317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:58,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:58,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 08:30:58,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897792954] [2021-11-09 08:30:58,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:30:58,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:30:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:30:58,073 INFO L87 Difference]: Start difference. First operand 100 states and 104 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 08:30:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:58,132 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-11-09 08:30:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:30:58,133 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 99 [2021-11-09 08:30:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:58,134 INFO L225 Difference]: With dead ends: 164 [2021-11-09 08:30:58,134 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 08:30:58,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:30:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 08:30:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-11-09 08:30:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-11-09 08:30:58,140 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-11-09 08:30:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:58,140 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-11-09 08:30:58,140 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 08:30:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-11-09 08:30:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 08:30:58,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:58,142 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:58,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:58,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:58,359 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:58,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2021-11-09 08:30:58,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:58,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826206814] [2021-11-09 08:30:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:58,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-09 08:30:58,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:58,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826206814] [2021-11-09 08:30:58,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826206814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:58,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843335694] [2021-11-09 08:30:58,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:30:58,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:58,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:58,621 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:58,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:30:58,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:30:58,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:30:59,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:30:59,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-09 08:30:59,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843335694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:59,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:59,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-09 08:30:59,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817009563] [2021-11-09 08:30:59,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:30:59,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:59,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:30:59,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:30:59,261 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 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 08:30:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:59,318 INFO L93 Difference]: Finished difference Result 165 states and 173 transitions. [2021-11-09 08:30:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:30:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 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 101 [2021-11-09 08:30:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:59,319 INFO L225 Difference]: With dead ends: 165 [2021-11-09 08:30:59,319 INFO L226 Difference]: Without dead ends: 104 [2021-11-09 08:30:59,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:30:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-09 08:30:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-09 08:30:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-11-09 08:30:59,324 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-11-09 08:30:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:59,325 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-11-09 08:30:59,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 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 08:30:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-11-09 08:30:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-09 08:30:59,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:59,326 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:59,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:59,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:30:59,551 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:30:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2021-11-09 08:30:59,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:59,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623730490] [2021-11-09 08:30:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:59,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2021-11-09 08:30:59,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:59,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623730490] [2021-11-09 08:30:59,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623730490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:59,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383485702] [2021-11-09 08:30:59,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:30:59,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:59,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:59,631 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:59,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:31:00,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:31:00,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:00,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:31:00,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-11-09 08:31:00,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383485702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:00,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:00,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-09 08:31:00,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428775692] [2021-11-09 08:31:00,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:31:00,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:00,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:31:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:00,637 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:00,735 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2021-11-09 08:31:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:31:00,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-09 08:31:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:00,740 INFO L225 Difference]: With dead ends: 163 [2021-11-09 08:31:00,741 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 08:31:00,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 08:31:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-11-09 08:31:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-11-09 08:31:00,746 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2021-11-09 08:31:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:00,747 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-11-09 08:31:00,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-11-09 08:31:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 08:31:00,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:00,748 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:00,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:00,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:00,975 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:00,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1920176930, now seen corresponding path program 22 times [2021-11-09 08:31:00,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:00,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965598209] [2021-11-09 08:31:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:00,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-11-09 08:31:01,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:01,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965598209] [2021-11-09 08:31:01,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965598209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:01,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571653922] [2021-11-09 08:31:01,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:01,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:01,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:01,123 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:01,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:31:01,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:31:01,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-11-09 08:31:01,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571653922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:01,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:01,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-09 08:31:01,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334940326] [2021-11-09 08:31:01,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:31:01,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:31:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:31:01,994 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:02,086 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2021-11-09 08:31:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:31:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-09 08:31:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:02,088 INFO L225 Difference]: With dead ends: 174 [2021-11-09 08:31:02,088 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 08:31:02,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:31:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 08:31:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2021-11-09 08:31:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 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 08:31:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-11-09 08:31:02,094 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 111 [2021-11-09 08:31:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:02,095 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-11-09 08:31:02,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-11-09 08:31:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-09 08:31:02,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:02,097 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:02,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:02,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:31:02,311 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1792878240, now seen corresponding path program 23 times [2021-11-09 08:31:02,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:02,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125963568] [2021-11-09 08:31:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:02,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-11-09 08:31:02,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:02,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125963568] [2021-11-09 08:31:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125963568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:02,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517142258] [2021-11-09 08:31:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:02,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:02,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:02,431 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:02,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:31:03,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-09 08:31:03,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:03,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:31:03,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-11-09 08:31:04,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517142258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:04,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:04,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 08:31:04,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753014517] [2021-11-09 08:31:04,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:31:04,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:04,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:31:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:31:04,082 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:04,180 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2021-11-09 08:31:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:31:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-09 08:31:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:04,183 INFO L225 Difference]: With dead ends: 184 [2021-11-09 08:31:04,183 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 08:31:04,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:31:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 08:31:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2021-11-09 08:31:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-11-09 08:31:04,188 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 117 [2021-11-09 08:31:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:04,189 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-11-09 08:31:04,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-11-09 08:31:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-09 08:31:04,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:04,190 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:04,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:04,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:31:04,391 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:04,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1830370402, now seen corresponding path program 24 times [2021-11-09 08:31:04,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:04,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690232438] [2021-11-09 08:31:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:04,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2021-11-09 08:31:04,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:04,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690232438] [2021-11-09 08:31:04,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690232438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:04,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51829250] [2021-11-09 08:31:04,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:04,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:04,501 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:04,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:31:06,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 08:31:06,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:31:06,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2021-11-09 08:31:06,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51829250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:06,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:06,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-11-09 08:31:06,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887791218] [2021-11-09 08:31:06,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:31:06,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:06,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:31:06,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:31:06,611 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:06,772 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2021-11-09 08:31:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:31:06,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-09 08:31:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:06,774 INFO L225 Difference]: With dead ends: 197 [2021-11-09 08:31:06,774 INFO L226 Difference]: Without dead ends: 136 [2021-11-09 08:31:06,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:31:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-09 08:31:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2021-11-09 08:31:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-11-09 08:31:06,782 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 123 [2021-11-09 08:31:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:06,782 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-11-09 08:31:06,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-11-09 08:31:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-09 08:31:06,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:06,784 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:06,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:07,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:31:07,007 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:07,008 INFO L85 PathProgramCache]: Analyzing trace with hash -778047078, now seen corresponding path program 25 times [2021-11-09 08:31:07,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:07,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251602555] [2021-11-09 08:31:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:07,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2021-11-09 08:31:07,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:07,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251602555] [2021-11-09 08:31:07,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251602555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:07,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756341209] [2021-11-09 08:31:07,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:07,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:07,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:07,167 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:07,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:31:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:07,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:31:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2021-11-09 08:31:08,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756341209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:08,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:08,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 08:31:08,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735887177] [2021-11-09 08:31:08,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:31:08,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:31:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:31:08,063 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:08,204 INFO L93 Difference]: Finished difference Result 208 states and 217 transitions. [2021-11-09 08:31:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:31:08,204 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-09 08:31:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:08,205 INFO L225 Difference]: With dead ends: 208 [2021-11-09 08:31:08,205 INFO L226 Difference]: Without dead ends: 141 [2021-11-09 08:31:08,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:31:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-09 08:31:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2021-11-09 08:31:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-11-09 08:31:08,211 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 131 [2021-11-09 08:31:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:08,211 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-11-09 08:31:08,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-11-09 08:31:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-09 08:31:08,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:08,214 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:08,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:08,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:31:08,432 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:08,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:08,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1235375592, now seen corresponding path program 26 times [2021-11-09 08:31:08,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:08,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033894110] [2021-11-09 08:31:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:08,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2021-11-09 08:31:08,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:08,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033894110] [2021-11-09 08:31:08,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033894110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:08,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846405520] [2021-11-09 08:31:08,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:08,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:08,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:08,598 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:08,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:31:09,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:09,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:09,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:31:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2021-11-09 08:31:09,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846405520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:09,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:09,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 08:31:09,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186857103] [2021-11-09 08:31:09,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:31:09,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:09,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:31:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:09,566 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:09,669 INFO L93 Difference]: Finished difference Result 218 states and 227 transitions. [2021-11-09 08:31:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:31:09,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-09 08:31:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:09,671 INFO L225 Difference]: With dead ends: 218 [2021-11-09 08:31:09,671 INFO L226 Difference]: Without dead ends: 147 [2021-11-09 08:31:09,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-09 08:31:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-11-09 08:31:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2021-11-09 08:31:09,677 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 137 [2021-11-09 08:31:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:09,678 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2021-11-09 08:31:09,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2021-11-09 08:31:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 08:31:09,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:09,680 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 12, 12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:09,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-09 08:31:09,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:31:09,895 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1804217366, now seen corresponding path program 27 times [2021-11-09 08:31:09,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:09,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623775896] [2021-11-09 08:31:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:09,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-11-09 08:31:10,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:10,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623775896] [2021-11-09 08:31:10,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623775896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:10,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324350613] [2021-11-09 08:31:10,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:10,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:10,071 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:10,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 08:31:11,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:31:11,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:11,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:31:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2021-11-09 08:31:11,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324350613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:11,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:11,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-11-09 08:31:11,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707801234] [2021-11-09 08:31:11,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:31:11,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:31:11,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:31:11,621 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:11,813 INFO L93 Difference]: Finished difference Result 231 states and 241 transitions. [2021-11-09 08:31:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:31:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-09 08:31:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:11,815 INFO L225 Difference]: With dead ends: 231 [2021-11-09 08:31:11,815 INFO L226 Difference]: Without dead ends: 156 [2021-11-09 08:31:11,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:31:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-09 08:31:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2021-11-09 08:31:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-11-09 08:31:11,822 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 143 [2021-11-09 08:31:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:11,822 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-11-09 08:31:11,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-11-09 08:31:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-09 08:31:11,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:11,824 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:11,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-09 08:31:12,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:12,043 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:12,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -94482158, now seen corresponding path program 28 times [2021-11-09 08:31:12,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:12,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138177880] [2021-11-09 08:31:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:12,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-11-09 08:31:12,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:12,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138177880] [2021-11-09 08:31:12,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138177880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:12,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880529091] [2021-11-09 08:31:12,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:12,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:12,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:12,223 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:12,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 08:31:13,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:13,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:13,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:31:13,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2021-11-09 08:31:13,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880529091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:13,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:13,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 08:31:13,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192131996] [2021-11-09 08:31:13,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:31:13,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:13,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:31:13,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:31:13,426 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 08:31:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:13,574 INFO L93 Difference]: Finished difference Result 242 states and 251 transitions. [2021-11-09 08:31:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:31:13,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) Word has length 151 [2021-11-09 08:31:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:13,576 INFO L225 Difference]: With dead ends: 242 [2021-11-09 08:31:13,577 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 08:31:13,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:31:13,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 08:31:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-11-09 08:31:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2021-11-09 08:31:13,583 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 151 [2021-11-09 08:31:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:13,583 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2021-11-09 08:31:13,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 08:31:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2021-11-09 08:31:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-09 08:31:13,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:13,585 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 14, 14, 14, 14, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:13,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:13,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:13,802 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash -931975536, now seen corresponding path program 29 times [2021-11-09 08:31:13,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:13,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085301256] [2021-11-09 08:31:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:13,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2021-11-09 08:31:14,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:14,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085301256] [2021-11-09 08:31:14,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085301256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:14,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787402398] [2021-11-09 08:31:14,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:14,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:14,073 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:14,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 08:31:18,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-09 08:31:18,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:18,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:31:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2021-11-09 08:31:19,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787402398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:19,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:19,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 08:31:19,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352450495] [2021-11-09 08:31:19,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:31:19,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:31:19,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:31:19,381 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:19,529 INFO L93 Difference]: Finished difference Result 252 states and 261 transitions. [2021-11-09 08:31:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:31:19,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-09 08:31:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:19,531 INFO L225 Difference]: With dead ends: 252 [2021-11-09 08:31:19,531 INFO L226 Difference]: Without dead ends: 167 [2021-11-09 08:31:19,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:31:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-09 08:31:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-11-09 08:31:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2021-11-09 08:31:19,540 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 157 [2021-11-09 08:31:19,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:19,541 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2021-11-09 08:31:19,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2021-11-09 08:31:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-09 08:31:19,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:19,543 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 15, 15, 15, 15, 15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:19,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:19,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:19,751 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:19,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1134925198, now seen corresponding path program 30 times [2021-11-09 08:31:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:19,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995485392] [2021-11-09 08:31:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:19,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 914 trivial. 0 not checked. [2021-11-09 08:31:19,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:19,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995485392] [2021-11-09 08:31:19,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995485392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:19,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505986070] [2021-11-09 08:31:19,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:19,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:19,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:19,956 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:19,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 08:31:25,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-09 08:31:25,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:25,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:31:25,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-09 08:31:25,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505986070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:25,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:25,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2021-11-09 08:31:25,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792539893] [2021-11-09 08:31:25,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:31:25,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:31:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:31:25,597 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:25,791 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2021-11-09 08:31:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:31:25,791 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 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 163 [2021-11-09 08:31:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:25,793 INFO L225 Difference]: With dead ends: 265 [2021-11-09 08:31:25,793 INFO L226 Difference]: Without dead ends: 176 [2021-11-09 08:31:25,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:31:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-09 08:31:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2021-11-09 08:31:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 171 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2021-11-09 08:31:25,800 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2021-11-09 08:31:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:25,800 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2021-11-09 08:31:25,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2021-11-09 08:31:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-09 08:31:25,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:25,802 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 16, 16, 16, 16, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:25,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:26,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 08:31:26,015 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -264277622, now seen corresponding path program 31 times [2021-11-09 08:31:26,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:26,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542716201] [2021-11-09 08:31:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:26,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2021-11-09 08:31:26,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:26,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542716201] [2021-11-09 08:31:26,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542716201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:26,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600438734] [2021-11-09 08:31:26,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:26,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:26,266 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:26,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 08:31:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:31:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2021-11-09 08:31:27,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600438734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:27,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:27,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 08:31:27,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908002754] [2021-11-09 08:31:27,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:31:27,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:31:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:31:27,549 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 08:31:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:27,738 INFO L93 Difference]: Finished difference Result 276 states and 285 transitions. [2021-11-09 08:31:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:31:27,738 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 171 [2021-11-09 08:31:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:27,740 INFO L225 Difference]: With dead ends: 276 [2021-11-09 08:31:27,740 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 08:31:27,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:31:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 08:31:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2021-11-09 08:31:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-11-09 08:31:27,746 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 171 [2021-11-09 08:31:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:27,747 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-11-09 08:31:27,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 08:31:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-11-09 08:31:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-09 08:31:27,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:27,749 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 17, 17, 17, 17, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:27,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:27,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:27,967 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash -91327480, now seen corresponding path program 32 times [2021-11-09 08:31:27,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:27,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767429772] [2021-11-09 08:31:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:27,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2021-11-09 08:31:28,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:28,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767429772] [2021-11-09 08:31:28,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767429772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:28,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352321198] [2021-11-09 08:31:28,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:28,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:28,246 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:28,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 08:31:29,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:29,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:31:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2021-11-09 08:31:29,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352321198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:29,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:29,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 08:31:29,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322774233] [2021-11-09 08:31:29,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:31:29,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:29,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:31:29,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:31:29,624 INFO L87 Difference]: Start difference. First operand 178 states and 182 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 08:31:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:29,809 INFO L93 Difference]: Finished difference Result 286 states and 295 transitions. [2021-11-09 08:31:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:31:29,809 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 177 [2021-11-09 08:31:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:29,811 INFO L225 Difference]: With dead ends: 286 [2021-11-09 08:31:29,811 INFO L226 Difference]: Without dead ends: 187 [2021-11-09 08:31:29,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:31:29,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-09 08:31:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-11-09 08:31:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0273224043715847) internal successors, (188), 183 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2021-11-09 08:31:29,817 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 177 [2021-11-09 08:31:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:29,818 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2021-11-09 08:31:29,818 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 08:31:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2021-11-09 08:31:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-09 08:31:29,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:29,820 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:29,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:30,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 08:31:30,020 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash 713670662, now seen corresponding path program 33 times [2021-11-09 08:31:30,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:30,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434339255] [2021-11-09 08:31:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:30,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2021-11-09 08:31:30,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:30,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434339255] [2021-11-09 08:31:30,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434339255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:30,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965981908] [2021-11-09 08:31:30,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:30,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:30,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:30,282 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:30,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 08:31:32,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 08:31:32,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:31:32,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2021-11-09 08:31:32,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965981908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:32,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:32,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2021-11-09 08:31:32,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864724619] [2021-11-09 08:31:32,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:31:32,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:32,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:31:32,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:31:32,618 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:32,917 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2021-11-09 08:31:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:31:32,918 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-09 08:31:32,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:32,919 INFO L225 Difference]: With dead ends: 299 [2021-11-09 08:31:32,919 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 08:31:32,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:31:32,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 08:31:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2021-11-09 08:31:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2021-11-09 08:31:32,930 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 183 [2021-11-09 08:31:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:32,930 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2021-11-09 08:31:32,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2021-11-09 08:31:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-09 08:31:32,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:32,932 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:32,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:33,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 08:31:33,132 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash 71570178, now seen corresponding path program 34 times [2021-11-09 08:31:33,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:33,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132955949] [2021-11-09 08:31:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:33,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1583 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1222 trivial. 0 not checked. [2021-11-09 08:31:33,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:33,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132955949] [2021-11-09 08:31:33,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132955949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:33,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245959203] [2021-11-09 08:31:33,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:31:33,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:33,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:33,440 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:33,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 08:31:34,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:31:34,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:34,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:31:34,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1583 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1222 trivial. 0 not checked. [2021-11-09 08:31:34,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245959203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:34,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:34,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-09 08:31:34,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552023179] [2021-11-09 08:31:34,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:31:34,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:31:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:31:34,818 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:34,988 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2021-11-09 08:31:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 08:31:34,989 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-09 08:31:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:34,990 INFO L225 Difference]: With dead ends: 307 [2021-11-09 08:31:34,990 INFO L226 Difference]: Without dead ends: 198 [2021-11-09 08:31:34,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:31:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-09 08:31:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-09 08:31:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2021-11-09 08:31:34,999 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 191 [2021-11-09 08:31:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:34,999 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2021-11-09 08:31:35,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2021-11-09 08:31:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-09 08:31:35,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:35,001 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:35,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:35,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:35,227 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash -611304832, now seen corresponding path program 35 times [2021-11-09 08:31:35,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:35,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510034239] [2021-11-09 08:31:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:35,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:35,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:35,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510034239] [2021-11-09 08:31:35,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510034239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:35,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236091990] [2021-11-09 08:31:35,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:31:35,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:35,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:35,401 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:35,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 08:31:43,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-09 08:31:43,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:43,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:31:43,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:43,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236091990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:43,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:43,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-09 08:31:43,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890914176] [2021-11-09 08:31:43,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:31:43,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:31:43,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:31:43,921 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:43,960 INFO L93 Difference]: Finished difference Result 248 states and 253 transitions. [2021-11-09 08:31:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:31:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-11-09 08:31:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:43,961 INFO L225 Difference]: With dead ends: 248 [2021-11-09 08:31:43,962 INFO L226 Difference]: Without dead ends: 201 [2021-11-09 08:31:43,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:31:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-09 08:31:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-11-09 08:31:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2021-11-09 08:31:43,969 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 197 [2021-11-09 08:31:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:43,970 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2021-11-09 08:31:43,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2021-11-09 08:31:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-09 08:31:43,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:43,972 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:44,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:44,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:44,195 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash 477116670, now seen corresponding path program 36 times [2021-11-09 08:31:44,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:44,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817677280] [2021-11-09 08:31:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:44,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:44,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:44,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817677280] [2021-11-09 08:31:44,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817677280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:44,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037311681] [2021-11-09 08:31:44,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:31:44,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:44,370 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:44,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 08:31:53,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-09 08:31:53,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:31:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:53,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037311681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:53,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:53,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 08:31:53,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491479097] [2021-11-09 08:31:53,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:31:53,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:53,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:31:53,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:53,626 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:53,673 INFO L93 Difference]: Finished difference Result 250 states and 255 transitions. [2021-11-09 08:31:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:31:53,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-09 08:31:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:53,674 INFO L225 Difference]: With dead ends: 250 [2021-11-09 08:31:53,674 INFO L226 Difference]: Without dead ends: 203 [2021-11-09 08:31:53,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:31:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-09 08:31:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-11-09 08:31:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0248756218905473) internal successors, (206), 201 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2021-11-09 08:31:53,693 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 199 [2021-11-09 08:31:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:53,693 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2021-11-09 08:31:53,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2021-11-09 08:31:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-09 08:31:53,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:53,695 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:53,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:53,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 08:31:53,903 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1521840132, now seen corresponding path program 37 times [2021-11-09 08:31:53,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:53,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927830426] [2021-11-09 08:31:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:53,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:54,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:54,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927830426] [2021-11-09 08:31:54,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927830426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:54,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362567445] [2021-11-09 08:31:54,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:31:54,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:54,130 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:54,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 08:31:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:55,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:31:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1744 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:55,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362567445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:55,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:55,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 08:31:55,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625960315] [2021-11-09 08:31:55,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:31:55,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:31:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:55,655 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:55,708 INFO L93 Difference]: Finished difference Result 252 states and 257 transitions. [2021-11-09 08:31:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:31:55,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-09 08:31:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:55,716 INFO L225 Difference]: With dead ends: 252 [2021-11-09 08:31:55,716 INFO L226 Difference]: Without dead ends: 205 [2021-11-09 08:31:55,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:31:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-09 08:31:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-11-09 08:31:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2021-11-09 08:31:55,726 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 201 [2021-11-09 08:31:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:55,726 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2021-11-09 08:31:55,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2021-11-09 08:31:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-09 08:31:55,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:55,729 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:55,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-09 08:31:55,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 08:31:55,943 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1626021754, now seen corresponding path program 38 times [2021-11-09 08:31:55,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:55,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934701369] [2021-11-09 08:31:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:55,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:56,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:56,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934701369] [2021-11-09 08:31:56,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934701369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:56,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164627931] [2021-11-09 08:31:56,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:31:56,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:56,167 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:56,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 08:31:57,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:31:57,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:31:57,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:31:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:57,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164627931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:57,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:57,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-09 08:31:57,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065108718] [2021-11-09 08:31:57,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:31:57,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:57,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:31:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:31:57,819 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 08:31:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:57,866 INFO L93 Difference]: Finished difference Result 254 states and 259 transitions. [2021-11-09 08:31:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:31:57,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) Word has length 203 [2021-11-09 08:31:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:57,868 INFO L225 Difference]: With dead ends: 254 [2021-11-09 08:31:57,869 INFO L226 Difference]: Without dead ends: 207 [2021-11-09 08:31:57,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:31:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-09 08:31:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2021-11-09 08:31:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.024390243902439) internal successors, (210), 205 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:31:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2021-11-09 08:31:57,875 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 203 [2021-11-09 08:31:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:57,875 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2021-11-09 08:31:57,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 08:31:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2021-11-09 08:31:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-09 08:31:57,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:57,877 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:57,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:58,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:58,078 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:31:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:58,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1230649480, now seen corresponding path program 39 times [2021-11-09 08:31:58,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:58,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289679563] [2021-11-09 08:31:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:58,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:31:58,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:58,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289679563] [2021-11-09 08:31:58,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289679563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:58,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472180836] [2021-11-09 08:31:58,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:31:58,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:58,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:58,276 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:58,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 08:32:03,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 08:32:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:03,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:32:03,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:32:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472180836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:03,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:03,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 08:32:03,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520932177] [2021-11-09 08:32:03,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:32:03,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:03,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:32:03,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:32:03,758 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 08:32:03,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:03,810 INFO L93 Difference]: Finished difference Result 256 states and 261 transitions. [2021-11-09 08:32:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:32:03,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) Word has length 205 [2021-11-09 08:32:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:03,813 INFO L225 Difference]: With dead ends: 256 [2021-11-09 08:32:03,813 INFO L226 Difference]: Without dead ends: 209 [2021-11-09 08:32:03,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:32:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-09 08:32:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2021-11-09 08:32:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0241545893719808) internal successors, (212), 207 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2021-11-09 08:32:03,820 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 205 [2021-11-09 08:32:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:03,821 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2021-11-09 08:32:03,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 08:32:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2021-11-09 08:32:03,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-09 08:32:03,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:03,823 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:03,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:04,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 08:32:04,051 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2007603210, now seen corresponding path program 40 times [2021-11-09 08:32:04,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:04,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644049701] [2021-11-09 08:32:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:04,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:32:04,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:04,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644049701] [2021-11-09 08:32:04,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644049701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:04,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135843959] [2021-11-09 08:32:04,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:32:04,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:04,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:04,329 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:04,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 08:32:05,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:32:05,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:32:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:32:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135843959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:06,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 08:32:06,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163243716] [2021-11-09 08:32:06,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:32:06,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:32:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:32:06,194 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 08:32:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:06,259 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2021-11-09 08:32:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:32:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 207 [2021-11-09 08:32:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:06,261 INFO L225 Difference]: With dead ends: 258 [2021-11-09 08:32:06,261 INFO L226 Difference]: Without dead ends: 211 [2021-11-09 08:32:06,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:32:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-09 08:32:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2021-11-09 08:32:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0239234449760766) internal successors, (214), 209 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2021-11-09 08:32:06,268 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 207 [2021-11-09 08:32:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:06,269 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2021-11-09 08:32:06,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 08:32:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2021-11-09 08:32:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-09 08:32:06,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:06,271 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:06,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:06,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 08:32:06,483 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1335828236, now seen corresponding path program 41 times [2021-11-09 08:32:06,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:06,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083061495] [2021-11-09 08:32:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:06,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:32:06,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:06,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083061495] [2021-11-09 08:32:06,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083061495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:06,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989726361] [2021-11-09 08:32:06,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:32:06,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:06,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:06,727 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:06,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 08:32:38,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-09 08:32:38,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:38,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 08:32:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:32:38,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989726361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:38,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:38,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-09 08:32:38,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296992034] [2021-11-09 08:32:38,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:32:38,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:32:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:32:38,730 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 08:32:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:38,789 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2021-11-09 08:32:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:32:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 209 [2021-11-09 08:32:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:38,792 INFO L225 Difference]: With dead ends: 260 [2021-11-09 08:32:38,792 INFO L226 Difference]: Without dead ends: 213 [2021-11-09 08:32:38,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:32:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-09 08:32:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2021-11-09 08:32:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.0236966824644549) internal successors, (216), 211 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2021-11-09 08:32:38,798 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 209 [2021-11-09 08:32:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:38,799 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2021-11-09 08:32:38,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 08:32:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2021-11-09 08:32:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-09 08:32:38,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:38,801 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:38,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-09 08:32:39,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:39,015 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash -5172622, now seen corresponding path program 42 times [2021-11-09 08:32:39,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:39,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876750436] [2021-11-09 08:32:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:39,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:32:39,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:39,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876750436] [2021-11-09 08:32:39,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876750436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:39,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486208097] [2021-11-09 08:32:39,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:32:39,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:39,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:39,303 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:39,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 08:33:13,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-09 08:33:13,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:33:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1889 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:33:13,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486208097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:13,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:13,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 08:33:13,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485918472] [2021-11-09 08:33:13,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:33:13,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:33:13,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:33:13,664 INFO L87 Difference]: Start difference. First operand 212 states and 216 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 08:33:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:13,724 INFO L93 Difference]: Finished difference Result 262 states and 267 transitions. [2021-11-09 08:33:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:33:13,725 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 211 [2021-11-09 08:33:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:13,727 INFO L225 Difference]: With dead ends: 262 [2021-11-09 08:33:13,727 INFO L226 Difference]: Without dead ends: 215 [2021-11-09 08:33:13,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:33:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-09 08:33:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2021-11-09 08:33:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.0234741784037558) internal successors, (218), 213 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2021-11-09 08:33:13,735 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 211 [2021-11-09 08:33:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:13,736 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2021-11-09 08:33:13,736 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 08:33:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2021-11-09 08:33:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-09 08:33:13,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:13,738 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:13,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:13,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 08:33:13,938 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1145381776, now seen corresponding path program 43 times [2021-11-09 08:33:13,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:13,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870765920] [2021-11-09 08:33:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:13,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:33:14,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:14,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870765920] [2021-11-09 08:33:14,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870765920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:14,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771886053] [2021-11-09 08:33:14,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:33:14,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:14,364 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:14,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 08:33:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:33:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-09 08:33:16,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771886053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:16,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:16,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 08:33:16,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264689099] [2021-11-09 08:33:16,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:33:16,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:33:16,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:33:16,365 INFO L87 Difference]: Start difference. First operand 214 states and 218 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 08:33:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:16,432 INFO L93 Difference]: Finished difference Result 263 states and 268 transitions. [2021-11-09 08:33:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:33:16,433 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 213 [2021-11-09 08:33:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:16,434 INFO L225 Difference]: With dead ends: 263 [2021-11-09 08:33:16,434 INFO L226 Difference]: Without dead ends: 216 [2021-11-09 08:33:16,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:33:16,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-09 08:33:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-11-09 08:33:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0232558139534884) internal successors, (220), 215 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2021-11-09 08:33:16,443 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 213 [2021-11-09 08:33:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:16,443 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2021-11-09 08:33:16,444 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 08:33:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2021-11-09 08:33:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-09 08:33:16,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:16,446 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:16,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:16,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f0773fd-2910-4941-aa58-f4172d6ed66e/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:16,669 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1669718290, now seen corresponding path program 44 times [2021-11-09 08:33:16,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:16,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794397059] [2021-11-09 08:33:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:16,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat