./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU --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 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:19:07,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:19:07,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:19:07,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:19:07,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:19:07,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:19:07,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:19:07,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:19:07,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:19:07,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:19:07,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:19:07,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:19:07,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:19:07,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:19:07,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:19:07,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:19:07,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:19:07,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:19:07,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:19:07,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:19:07,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:19:07,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:19:07,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:19:07,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:19:07,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:19:07,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:19:07,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:19:07,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:19:07,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:19:07,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:19:07,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:19:07,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:19:07,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:19:07,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:19:07,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:19:07,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:19:07,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:19:07,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:19:07,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:19:07,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:19:07,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:19:07,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:19:07,903 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:19:07,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:19:07,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:19:07,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:19:07,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:19:07,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:19:07,909 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:19:07,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:19:07,909 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:19:07,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:19:07,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:19:07,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:19:07,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:19:07,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:19:07,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:19:07,913 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:19:07,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:19:07,913 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:19:07,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:19:07,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:19:07,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:19:07,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:19:07,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:07,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:19:07,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:19:07,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:19:07,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:19:07,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:19:07,916 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:19:07,918 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:19:07,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:19:07,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:19:07,919 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_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 [2021-11-02 22:19:08,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:19:08,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:19:08,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:19:08,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:19:08,323 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:19:08,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2021-11-02 22:19:08,415 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/data/da34d26b5/a130f7f838b1483e923ca9f85533ee3d/FLAG68e045a9c [2021-11-02 22:19:09,109 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:19:09,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2021-11-02 22:19:09,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/data/da34d26b5/a130f7f838b1483e923ca9f85533ee3d/FLAG68e045a9c [2021-11-02 22:19:09,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/data/da34d26b5/a130f7f838b1483e923ca9f85533ee3d [2021-11-02 22:19:09,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:19:09,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:19:09,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:09,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:19:09,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:19:09,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@435b3dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09, skipping insertion in model container [2021-11-02 22:19:09,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:19:09,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:19:09,707 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_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2021-11-02 22:19:09,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:09,756 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:19:09,772 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_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2021-11-02 22:19:09,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:09,815 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:19:09,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09 WrapperNode [2021-11-02 22:19:09,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:09,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:09,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:19:09,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:19:09,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:09,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:19:09,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:19:09,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:19:09,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:19:09,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:19:09,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:19:09,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:19:09,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (1/1) ... [2021-11-02 22:19:09,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:09,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:09,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:19:09,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:19:10,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:19:10,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:19:10,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:19:10,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:19:10,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:19:10,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:19:10,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:19:10,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:19:10,368 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:19:10,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:19:10 BoogieIcfgContainer [2021-11-02 22:19:10,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:19:10,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:19:10,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:19:10,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:19:10,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:19:09" (1/3) ... [2021-11-02 22:19:10,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2557bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:19:10, skipping insertion in model container [2021-11-02 22:19:10,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:09" (2/3) ... [2021-11-02 22:19:10,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2557bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:19:10, skipping insertion in model container [2021-11-02 22:19:10,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:19:10" (3/3) ... [2021-11-02 22:19:10,398 INFO L111 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2021-11-02 22:19:10,405 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:19:10,405 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:19:10,465 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:19:10,473 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 [2021-11-02 22:19:10,474 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:19:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 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) [2021-11-02 22:19:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 22:19:10,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:10,499 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:10,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:10,507 INFO L85 PathProgramCache]: Analyzing trace with hash 252221889, now seen corresponding path program 1 times [2021-11-02 22:19:10,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:10,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351522436] [2021-11-02 22:19:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:10,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:10,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:10,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743247972] [2021-11-02 22:19:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:10,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:10,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:10,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:10,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:19:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:19:10,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:10,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:10,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351522436] [2021-11-02 22:19:10,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:10,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743247972] [2021-11-02 22:19:10,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743247972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:10,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:10,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:10,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978341397] [2021-11-02 22:19:10,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:10,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:10,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:10,968 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:11,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:11,012 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2021-11-02 22:19:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:11,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-02 22:19:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:11,024 INFO L225 Difference]: With dead ends: 35 [2021-11-02 22:19:11,025 INFO L226 Difference]: Without dead ends: 16 [2021-11-02 22:19:11,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-02 22:19:11,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-11-02 22:19:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-11-02 22:19:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-02 22:19:11,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-11-02 22:19:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:11,067 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-02 22:19:11,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:11,068 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-02 22:19:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:19:11,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:11,069 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:11,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:11,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:11,285 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:11,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1550338388, now seen corresponding path program 1 times [2021-11-02 22:19:11,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:11,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090274543] [2021-11-02 22:19:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:11,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:11,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:11,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58658671] [2021-11-02 22:19:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:11,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:11,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:11,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:19:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:11,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:19:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:11,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:11,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090274543] [2021-11-02 22:19:11,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:11,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58658671] [2021-11-02 22:19:11,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58658671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:11,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:11,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:19:11,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683485514] [2021-11-02 22:19:11,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:19:11,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:19:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:11,452 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:11,519 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-11-02 22:19:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:19:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:19:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:11,521 INFO L225 Difference]: With dead ends: 32 [2021-11-02 22:19:11,522 INFO L226 Difference]: Without dead ends: 21 [2021-11-02 22:19:11,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-02 22:19:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-11-02 22:19:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2021-11-02 22:19:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-02 22:19:11,539 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-11-02 22:19:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:11,540 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-02 22:19:11,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-02 22:19:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:19:11,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:11,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:11,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:11,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:11,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:11,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2127602064, now seen corresponding path program 1 times [2021-11-02 22:19:11,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:11,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157585259] [2021-11-02 22:19:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:11,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:11,795 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:11,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101847612] [2021-11-02 22:19:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:11,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:11,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:11,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:11,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:19:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:19:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:11,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:11,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157585259] [2021-11-02 22:19:11,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:11,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101847612] [2021-11-02 22:19:11,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101847612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:11,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:11,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:19:11,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370595696] [2021-11-02 22:19:11,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:19:11,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:11,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:19:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:11,971 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:12,023 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-11-02 22:19:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:19:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 22:19:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:12,025 INFO L225 Difference]: With dead ends: 40 [2021-11-02 22:19:12,025 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 22:19:12,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 22:19:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-11-02 22:19:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-02 22:19:12,034 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2021-11-02 22:19:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:12,035 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-02 22:19:12,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:12,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-02 22:19:12,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:19:12,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:12,037 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:12,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:12,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:12,261 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:12,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1452060460, now seen corresponding path program 2 times [2021-11-02 22:19:12,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:12,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856939746] [2021-11-02 22:19:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:12,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:12,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:12,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897179930] [2021-11-02 22:19:12,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:12,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:12,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:12,309 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:12,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:19:12,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:19:12,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:19:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:12,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:12,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856939746] [2021-11-02 22:19:12,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:12,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897179930] [2021-11-02 22:19:12,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897179930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:12,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:12,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:19:12,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290201180] [2021-11-02 22:19:12,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:19:12,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:19:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:19:12,582 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:12,673 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-11-02 22:19:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:19:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-02 22:19:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:12,678 INFO L225 Difference]: With dead ends: 50 [2021-11-02 22:19:12,678 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 22:19:12,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:19:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 22:19:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2021-11-02 22:19:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-02 22:19:12,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 13 [2021-11-02 22:19:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:12,687 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-02 22:19:12,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-02 22:19:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:19:12,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:12,689 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:12,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:12,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:12,890 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:12,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash 752449008, now seen corresponding path program 3 times [2021-11-02 22:19:12,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:12,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808532718] [2021-11-02 22:19:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:12,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:12,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:12,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904226792] [2021-11-02 22:19:12,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:19:12,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:12,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:12,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:12,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:19:12,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:19:12,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:19:13,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:19:13,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:13,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808532718] [2021-11-02 22:19:13,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:13,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904226792] [2021-11-02 22:19:13,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904226792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:13,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:13,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-02 22:19:13,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730932214] [2021-11-02 22:19:13,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:19:13,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:19:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:13,165 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:13,220 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-11-02 22:19:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:19:13,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 22:19:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:13,223 INFO L225 Difference]: With dead ends: 50 [2021-11-02 22:19:13,223 INFO L226 Difference]: Without dead ends: 35 [2021-11-02 22:19:13,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:19:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-02 22:19:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-02 22:19:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-02 22:19:13,242 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2021-11-02 22:19:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:13,243 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-02 22:19:13,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-02 22:19:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:19:13,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:13,245 INFO L513 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:13,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:13,465 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1071264479, now seen corresponding path program 4 times [2021-11-02 22:19:13,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:13,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933104079] [2021-11-02 22:19:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:13,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:13,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:13,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538125454] [2021-11-02 22:19:13,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:19:13,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:13,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:13,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:13,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:19:13,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:19:13,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:19:13,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:19:13,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:13,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933104079] [2021-11-02 22:19:13,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:13,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538125454] [2021-11-02 22:19:13,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538125454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:13,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:13,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:19:13,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287119107] [2021-11-02 22:19:13,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:19:13,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:19:13,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:19:13,815 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-11-02 22:19:13,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:13,888 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-11-02 22:19:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:19:13,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 20 [2021-11-02 22:19:13,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:13,891 INFO L225 Difference]: With dead ends: 69 [2021-11-02 22:19:13,891 INFO L226 Difference]: Without dead ends: 46 [2021-11-02 22:19:13,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:19:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-02 22:19:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2021-11-02 22:19:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2021-11-02 22:19:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-02 22:19:13,907 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-11-02 22:19:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:13,907 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-02 22:19:13,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-11-02 22:19:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-02 22:19:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:19:13,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:13,910 INFO L513 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:13,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:14,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:14,125 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:14,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1446499487, now seen corresponding path program 5 times [2021-11-02 22:19:14,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:14,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830092668] [2021-11-02 22:19:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:14,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:14,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:14,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126393381] [2021-11-02 22:19:14,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:19:14,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:14,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:14,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:14,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:19:14,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 22:19:14,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:19:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 22:19:14,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:14,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830092668] [2021-11-02 22:19:14,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:14,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126393381] [2021-11-02 22:19:14,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126393381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:14,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:14,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:19:14,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063280776] [2021-11-02 22:19:14,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:19:14,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:19:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:19:14,693 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:14,782 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-11-02 22:19:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:19:14,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 22:19:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:14,789 INFO L225 Difference]: With dead ends: 80 [2021-11-02 22:19:14,791 INFO L226 Difference]: Without dead ends: 53 [2021-11-02 22:19:14,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:19:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-02 22:19:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2021-11-02 22:19:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 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) [2021-11-02 22:19:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-11-02 22:19:14,800 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2021-11-02 22:19:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:14,800 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-11-02 22:19:14,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-11-02 22:19:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:19:14,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:14,802 INFO L513 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:14,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:15,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:19:15,009 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:15,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1984716257, now seen corresponding path program 6 times [2021-11-02 22:19:15,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:15,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373452567] [2021-11-02 22:19:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:15,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:15,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:15,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073577127] [2021-11-02 22:19:15,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:19:15,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:15,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:15,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:15,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:19:15,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 22:19:15,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:15,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:19:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 22:19:15,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373452567] [2021-11-02 22:19:15,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:15,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073577127] [2021-11-02 22:19:15,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073577127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:15,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:15,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:19:15,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786441033] [2021-11-02 22:19:15,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:19:15,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:15,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:19:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:15,427 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:15,468 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-11-02 22:19:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:19:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 22:19:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:15,474 INFO L225 Difference]: With dead ends: 76 [2021-11-02 22:19:15,474 INFO L226 Difference]: Without dead ends: 55 [2021-11-02 22:19:15,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-02 22:19:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-11-02 22:19:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-11-02 22:19:15,506 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 24 [2021-11-02 22:19:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:15,506 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-11-02 22:19:15,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-11-02 22:19:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:19:15,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:15,508 INFO L513 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:15,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:15,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:15,717 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash -895518770, now seen corresponding path program 7 times [2021-11-02 22:19:15,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:15,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021620233] [2021-11-02 22:19:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:15,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:15,730 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:15,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046904053] [2021-11-02 22:19:15,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:19:15,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:15,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:15,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:19:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:19:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-02 22:19:16,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:16,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021620233] [2021-11-02 22:19:16,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:16,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046904053] [2021-11-02 22:19:16,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046904053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:16,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:16,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:19:16,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119093727] [2021-11-02 22:19:16,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:19:16,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:19:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:19:16,071 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-11-02 22:19:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:16,146 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2021-11-02 22:19:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:19:16,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 32 [2021-11-02 22:19:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:16,149 INFO L225 Difference]: With dead ends: 108 [2021-11-02 22:19:16,149 INFO L226 Difference]: Without dead ends: 69 [2021-11-02 22:19:16,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:19:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-02 22:19:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2021-11-02 22:19:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 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) [2021-11-02 22:19:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-11-02 22:19:16,171 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 32 [2021-11-02 22:19:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:16,172 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-11-02 22:19:16,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-11-02 22:19:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-11-02 22:19:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:19:16,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:16,177 INFO L513 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:16,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:16,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-02 22:19:16,405 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:16,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1989106740, now seen corresponding path program 8 times [2021-11-02 22:19:16,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:16,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229093255] [2021-11-02 22:19:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:16,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:16,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:16,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490105468] [2021-11-02 22:19:16,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:16,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:16,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:16,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:16,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:19:16,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:19:16,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:19:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-02 22:19:16,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:16,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229093255] [2021-11-02 22:19:16,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:16,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490105468] [2021-11-02 22:19:16,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490105468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:16,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:16,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:19:16,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6300842] [2021-11-02 22:19:16,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:19:16,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:16,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:19:16,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:19:16,824 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:16,900 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2021-11-02 22:19:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:19:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 22:19:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:16,902 INFO L225 Difference]: With dead ends: 121 [2021-11-02 22:19:16,902 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 22:19:16,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:19:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 22:19:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2021-11-02 22:19:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 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) [2021-11-02 22:19:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-02 22:19:16,913 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 35 [2021-11-02 22:19:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:16,913 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-02 22:19:16,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-02 22:19:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:19:16,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:16,915 INFO L513 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:16,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:17,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:19:17,140 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1759674610, now seen corresponding path program 9 times [2021-11-02 22:19:17,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:17,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492306252] [2021-11-02 22:19:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:17,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:17,153 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:17,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034901330] [2021-11-02 22:19:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:19:17,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:17,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:17,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:17,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:19:17,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 22:19:17,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:19:17,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 133 proven. 28 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-02 22:19:17,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:17,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492306252] [2021-11-02 22:19:17,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:17,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034901330] [2021-11-02 22:19:17,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034901330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:17,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:17,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:19:17,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572422068] [2021-11-02 22:19:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:19:17,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:19:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:19:17,892 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:17,984 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2021-11-02 22:19:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:19:17,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 22:19:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:17,986 INFO L225 Difference]: With dead ends: 134 [2021-11-02 22:19:17,986 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 22:19:17,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:19:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 22:19:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2021-11-02 22:19:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-11-02 22:19:18,014 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 38 [2021-11-02 22:19:18,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:18,014 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-11-02 22:19:18,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-11-02 22:19:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:19:18,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:18,020 INFO L513 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:18,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:18,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:19:18,233 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1214780812, now seen corresponding path program 10 times [2021-11-02 22:19:18,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:18,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403453212] [2021-11-02 22:19:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:18,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:18,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:18,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847332186] [2021-11-02 22:19:18,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:19:18,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:18,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:18,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:18,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:19:20,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:19:20,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:20,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:19:20,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 167 proven. 36 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-02 22:19:20,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:20,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403453212] [2021-11-02 22:19:20,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:20,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847332186] [2021-11-02 22:19:20,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847332186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:20,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:20,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:19:20,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118411230] [2021-11-02 22:19:20,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:19:20,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:19:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:19:20,711 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:20,803 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2021-11-02 22:19:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:19:20,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 22:19:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:20,805 INFO L225 Difference]: With dead ends: 147 [2021-11-02 22:19:20,805 INFO L226 Difference]: Without dead ends: 93 [2021-11-02 22:19:20,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:19:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-02 22:19:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2021-11-02 22:19:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 71 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-11-02 22:19:20,816 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 41 [2021-11-02 22:19:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:20,817 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-11-02 22:19:20,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-11-02 22:19:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:19:20,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:20,818 INFO L513 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:20,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:21,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:19:21,030 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:21,030 INFO L85 PathProgramCache]: Analyzing trace with hash 320165454, now seen corresponding path program 11 times [2021-11-02 22:19:21,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:21,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211161680] [2021-11-02 22:19:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:21,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:21,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:21,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064767190] [2021-11-02 22:19:21,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:19:21,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:21,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:21,043 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:21,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:19:23,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 22:19:23,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:23,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:19:23,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 306 proven. 45 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-02 22:19:23,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:23,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211161680] [2021-11-02 22:19:23,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:23,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064767190] [2021-11-02 22:19:23,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064767190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:23,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:23,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:19:23,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536076148] [2021-11-02 22:19:23,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:19:23,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:19:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:19:23,586 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:23,689 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2021-11-02 22:19:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:19:23,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 22:19:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:23,691 INFO L225 Difference]: With dead ends: 160 [2021-11-02 22:19:23,691 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 22:19:23,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:19:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 22:19:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2021-11-02 22:19:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 77 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-11-02 22:19:23,701 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 44 [2021-11-02 22:19:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:23,702 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-11-02 22:19:23,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-11-02 22:19:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:19:23,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:23,703 INFO L513 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:23,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:23,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:23,915 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1475922100, now seen corresponding path program 12 times [2021-11-02 22:19:23,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:23,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493401897] [2021-11-02 22:19:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:23,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:23,941 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:23,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458398312] [2021-11-02 22:19:23,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:19:23,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:23,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:23,943 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:23,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:19:24,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-02 22:19:24,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:24,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:19:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 369 proven. 55 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-02 22:19:25,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:25,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493401897] [2021-11-02 22:19:25,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:25,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458398312] [2021-11-02 22:19:25,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458398312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:25,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:25,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 22:19:25,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541953562] [2021-11-02 22:19:25,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:19:25,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:19:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:19:25,202 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2021-11-02 22:19:25,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:25,306 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2021-11-02 22:19:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:19:25,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 22:19:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:25,308 INFO L225 Difference]: With dead ends: 173 [2021-11-02 22:19:25,308 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 22:19:25,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:19:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 22:19:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2021-11-02 22:19:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2021-11-02 22:19:25,317 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 47 [2021-11-02 22:19:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:25,318 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2021-11-02 22:19:25,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2021-11-02 22:19:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2021-11-02 22:19:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:19:25,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:25,319 INFO L513 BasicCegarLoop]: trace histogram [33, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:25,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:25,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:25,540 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1674771854, now seen corresponding path program 13 times [2021-11-02 22:19:25,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:25,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432534830] [2021-11-02 22:19:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:25,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:25,560 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:25,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386342505] [2021-11-02 22:19:25,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:19:25,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:25,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:25,573 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:25,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:19:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:19:25,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 291 proven. 66 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-02 22:19:26,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:26,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432534830] [2021-11-02 22:19:26,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:26,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386342505] [2021-11-02 22:19:26,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386342505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:26,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:26,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 22:19:26,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902942285] [2021-11-02 22:19:26,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:19:26,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:19:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:19:26,185 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-11-02 22:19:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:26,321 INFO L93 Difference]: Finished difference Result 186 states and 209 transitions. [2021-11-02 22:19:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:19:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 50 [2021-11-02 22:19:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:26,323 INFO L225 Difference]: With dead ends: 186 [2021-11-02 22:19:26,324 INFO L226 Difference]: Without dead ends: 117 [2021-11-02 22:19:26,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:19:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-02 22:19:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2021-11-02 22:19:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 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) [2021-11-02 22:19:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-11-02 22:19:26,338 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 50 [2021-11-02 22:19:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:26,338 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-11-02 22:19:26,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-11-02 22:19:26,339 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-11-02 22:19:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:19:26,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:26,341 INFO L513 BasicCegarLoop]: trace histogram [36, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:26,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:26,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:26,564 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1522665740, now seen corresponding path program 14 times [2021-11-02 22:19:26,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:26,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977200629] [2021-11-02 22:19:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:26,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:26,576 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:26,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147996636] [2021-11-02 22:19:26,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:19:26,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:26,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:26,578 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:26,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:19:26,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:19:26,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:26,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:19:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 341 proven. 78 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-02 22:19:27,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:27,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977200629] [2021-11-02 22:19:27,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:27,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147996636] [2021-11-02 22:19:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147996636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:27,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:27,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:19:27,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349973473] [2021-11-02 22:19:27,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:19:27,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:19:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:19:27,237 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:27,369 INFO L93 Difference]: Finished difference Result 199 states and 223 transitions. [2021-11-02 22:19:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:19:27,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:19:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:27,371 INFO L225 Difference]: With dead ends: 199 [2021-11-02 22:19:27,372 INFO L226 Difference]: Without dead ends: 125 [2021-11-02 22:19:27,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:19:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-02 22:19:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-11-02 22:19:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 95 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2021-11-02 22:19:27,383 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 53 [2021-11-02 22:19:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:27,384 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2021-11-02 22:19:27,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2021-11-02 22:19:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:19:27,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:27,388 INFO L513 BasicCegarLoop]: trace histogram [39, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:27,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:27,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:19:27,609 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:27,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1872917710, now seen corresponding path program 15 times [2021-11-02 22:19:27,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:27,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658763886] [2021-11-02 22:19:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:27,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:27,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:27,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247934334] [2021-11-02 22:19:27,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:19:27,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:27,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:27,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:27,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:19:35,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 22:19:35,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:19:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:19:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:19:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 397 proven. 91 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-02 22:19:36,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:36,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658763886] [2021-11-02 22:19:36,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:19:36,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247934334] [2021-11-02 22:19:36,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247934334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:19:36,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:19:36,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:19:36,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813671502] [2021-11-02 22:19:36,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:19:36,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:36,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:19:36,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:19:36,218 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2021-11-02 22:19:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:36,343 INFO L93 Difference]: Finished difference Result 212 states and 237 transitions. [2021-11-02 22:19:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:19:36,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 22:19:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:36,345 INFO L225 Difference]: With dead ends: 212 [2021-11-02 22:19:36,345 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 22:19:36,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:19:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 22:19:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2021-11-02 22:19:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.188118811881188) internal successors, (120), 101 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2021-11-02 22:19:36,357 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 56 [2021-11-02 22:19:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:36,359 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2021-11-02 22:19:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2021-11-02 22:19:36,360 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2021-11-02 22:19:36,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:19:36,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:36,361 INFO L513 BasicCegarLoop]: trace histogram [42, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:36,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:19:36,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:19:36,581 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash -770929972, now seen corresponding path program 16 times [2021-11-02 22:19:36,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:36,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905795680] [2021-11-02 22:19:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:36,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:36,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:19:36,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083930836] [2021-11-02 22:19:36,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:19:36,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:19:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:36,596 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:19:36,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:20:00,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:20:00,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:00,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:20:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 453 proven. 105 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-02 22:20:01,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:01,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905795680] [2021-11-02 22:20:01,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:20:01,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083930836] [2021-11-02 22:20:01,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083930836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:01,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:01,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:20:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589303005] [2021-11-02 22:20:01,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:20:01,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:01,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:20:01,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:20:01,171 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2021-11-02 22:20:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:01,321 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2021-11-02 22:20:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:20:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-02 22:20:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:01,323 INFO L225 Difference]: With dead ends: 225 [2021-11-02 22:20:01,323 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 22:20:01,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:20:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 22:20:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 108. [2021-11-02 22:20:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 107 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2021-11-02 22:20:01,335 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 59 [2021-11-02 22:20:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:01,335 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2021-11-02 22:20:01,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2021-11-02 22:20:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2021-11-02 22:20:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:20:01,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:01,336 INFO L513 BasicCegarLoop]: trace histogram [45, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:01,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:01,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:20:01,537 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1647330290, now seen corresponding path program 17 times [2021-11-02 22:20:01,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:01,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559469256] [2021-11-02 22:20:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:01,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:01,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:20:01,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583933988] [2021-11-02 22:20:01,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:20:01,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:01,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:01,564 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:01,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:20:27,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-11-02 22:20:27,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:20:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 774 proven. 120 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-02 22:20:27,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:27,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559469256] [2021-11-02 22:20:27,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:20:27,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583933988] [2021-11-02 22:20:27,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583933988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:27,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:27,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:20:27,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186353886] [2021-11-02 22:20:27,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:20:27,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:20:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:20:27,900 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:28,025 INFO L93 Difference]: Finished difference Result 238 states and 265 transitions. [2021-11-02 22:20:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:20:28,025 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-02 22:20:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:28,027 INFO L225 Difference]: With dead ends: 238 [2021-11-02 22:20:28,027 INFO L226 Difference]: Without dead ends: 149 [2021-11-02 22:20:28,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:20:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-02 22:20:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2021-11-02 22:20:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 113 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2021-11-02 22:20:28,038 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 62 [2021-11-02 22:20:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:28,038 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2021-11-02 22:20:28,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2021-11-02 22:20:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:20:28,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:28,040 INFO L513 BasicCegarLoop]: trace histogram [48, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:28,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:28,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:28,253 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2119875724, now seen corresponding path program 18 times [2021-11-02 22:20:28,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:28,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18800852] [2021-11-02 22:20:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:28,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:28,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:20:28,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898198946] [2021-11-02 22:20:28,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:20:28,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:28,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:28,265 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:28,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:20:40,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-11-02 22:20:40,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:20:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 873 proven. 136 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-02 22:20:41,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:41,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18800852] [2021-11-02 22:20:41,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:20:41,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898198946] [2021-11-02 22:20:41,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898198946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:41,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:41,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:20:41,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052670875] [2021-11-02 22:20:41,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:20:41,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:20:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:20:41,323 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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) [2021-11-02 22:20:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:41,469 INFO L93 Difference]: Finished difference Result 251 states and 279 transitions. [2021-11-02 22:20:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:20:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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 65 [2021-11-02 22:20:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:41,471 INFO L225 Difference]: With dead ends: 251 [2021-11-02 22:20:41,471 INFO L226 Difference]: Without dead ends: 157 [2021-11-02 22:20:41,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:20:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-02 22:20:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 120. [2021-11-02 22:20:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.184873949579832) internal successors, (141), 119 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2021-11-02 22:20:41,483 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 65 [2021-11-02 22:20:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:41,484 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2021-11-02 22:20:41,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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) [2021-11-02 22:20:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2021-11-02 22:20:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:20:41,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:41,485 INFO L513 BasicCegarLoop]: trace histogram [51, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:41,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:41,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:41,701 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:41,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1767451826, now seen corresponding path program 19 times [2021-11-02 22:20:41,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:41,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212999039] [2021-11-02 22:20:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:41,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:41,709 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:20:41,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035200261] [2021-11-02 22:20:41,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:20:41,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:41,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:41,711 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:41,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:20:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:20:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 651 proven. 153 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2021-11-02 22:20:42,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:42,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212999039] [2021-11-02 22:20:42,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:20:42,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035200261] [2021-11-02 22:20:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035200261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:42,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:42,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-02 22:20:42,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527053208] [2021-11-02 22:20:42,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:20:42,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:20:42,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:20:42,556 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-11-02 22:20:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:42,719 INFO L93 Difference]: Finished difference Result 264 states and 293 transitions. [2021-11-02 22:20:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:20:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 22:20:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:42,721 INFO L225 Difference]: With dead ends: 264 [2021-11-02 22:20:42,721 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 22:20:42,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:20:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 22:20:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2021-11-02 22:20:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.184) internal successors, (148), 125 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) [2021-11-02 22:20:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2021-11-02 22:20:42,735 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 68 [2021-11-02 22:20:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:42,735 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2021-11-02 22:20:42,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-11-02 22:20:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2021-11-02 22:20:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:20:42,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:42,737 INFO L513 BasicCegarLoop]: trace histogram [54, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:42,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:42,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:42,941 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:42,941 INFO L85 PathProgramCache]: Analyzing trace with hash 253795916, now seen corresponding path program 20 times [2021-11-02 22:20:42,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:42,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072790713] [2021-11-02 22:20:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:42,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:42,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:20:42,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169581258] [2021-11-02 22:20:42,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:20:42,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:42,954 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:42,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:20:43,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:20:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:20:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1605 backedges. 725 proven. 171 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2021-11-02 22:20:43,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:43,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072790713] [2021-11-02 22:20:43,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:20:43,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169581258] [2021-11-02 22:20:43,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169581258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:43,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:43,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 22:20:43,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629724531] [2021-11-02 22:20:43,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:20:43,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:43,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:20:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:20:43,866 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2021-11-02 22:20:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:44,036 INFO L93 Difference]: Finished difference Result 277 states and 307 transitions. [2021-11-02 22:20:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:20:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 22:20:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:44,039 INFO L225 Difference]: With dead ends: 277 [2021-11-02 22:20:44,039 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 22:20:44,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:20:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 22:20:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2021-11-02 22:20:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.183206106870229) internal successors, (155), 131 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2021-11-02 22:20:44,058 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 71 [2021-11-02 22:20:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:44,059 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2021-11-02 22:20:44,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2021-11-02 22:20:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2021-11-02 22:20:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:20:44,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:44,060 INFO L513 BasicCegarLoop]: trace histogram [57, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:44,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:44,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:44,284 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:44,285 INFO L85 PathProgramCache]: Analyzing trace with hash 57916046, now seen corresponding path program 21 times [2021-11-02 22:20:44,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:44,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9857657] [2021-11-02 22:20:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:44,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:44,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:20:44,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083065283] [2021-11-02 22:20:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:20:44,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:44,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:44,303 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:44,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:21:01,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-02 22:21:01,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:01,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:21:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 805 proven. 190 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-02 22:21:01,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:01,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9857657] [2021-11-02 22:21:01,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:21:01,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083065283] [2021-11-02 22:21:01,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083065283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:01,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:01,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:21:01,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761577442] [2021-11-02 22:21:01,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:21:01,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:21:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:21:01,981 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) [2021-11-02 22:21:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:02,139 INFO L93 Difference]: Finished difference Result 290 states and 321 transitions. [2021-11-02 22:21:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:21:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 74 [2021-11-02 22:21:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:02,141 INFO L225 Difference]: With dead ends: 290 [2021-11-02 22:21:02,141 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 22:21:02,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:21:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 22:21:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2021-11-02 22:21:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 137 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) [2021-11-02 22:21:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2021-11-02 22:21:02,154 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 74 [2021-11-02 22:21:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:02,155 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2021-11-02 22:21:02,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) [2021-11-02 22:21:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2021-11-02 22:21:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:21:02,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:02,156 INFO L513 BasicCegarLoop]: trace histogram [60, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:02,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:02,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:02,372 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1294847988, now seen corresponding path program 22 times [2021-11-02 22:21:02,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:02,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294864462] [2021-11-02 22:21:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:02,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:02,380 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:21:02,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717904785] [2021-11-02 22:21:02,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:21:02,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:02,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:02,384 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:02,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:21:53,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:21:53,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:21:53,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:21:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 885 proven. 210 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2021-11-02 22:21:53,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:53,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294864462] [2021-11-02 22:21:53,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:21:53,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717904785] [2021-11-02 22:21:53,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717904785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:53,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:53,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 22:21:53,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078322972] [2021-11-02 22:21:53,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:21:53,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:21:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:21:53,935 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 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) [2021-11-02 22:21:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:54,118 INFO L93 Difference]: Finished difference Result 303 states and 335 transitions. [2021-11-02 22:21:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:21:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 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 77 [2021-11-02 22:21:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:54,121 INFO L225 Difference]: With dead ends: 303 [2021-11-02 22:21:54,121 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 22:21:54,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:21:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 22:21:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-11-02 22:21:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1818181818181819) internal successors, (169), 143 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions. [2021-11-02 22:21:54,136 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 77 [2021-11-02 22:21:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:54,136 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 169 transitions. [2021-11-02 22:21:54,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 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) [2021-11-02 22:21:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions. [2021-11-02 22:21:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:21:54,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:54,138 INFO L513 BasicCegarLoop]: trace histogram [63, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:54,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:54,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:54,360 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1317171662, now seen corresponding path program 23 times [2021-11-02 22:21:54,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:54,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083819384] [2021-11-02 22:21:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:54,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:54,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:21:54,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727727210] [2021-11-02 22:21:54,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:21:54,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:54,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:54,389 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:54,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:25:58,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-02 22:25:58,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:58,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:25:58,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2154 backedges. 1458 proven. 231 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-02 22:25:59,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:59,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083819384] [2021-11-02 22:25:59,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:25:59,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727727210] [2021-11-02 22:25:59,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727727210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:59,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:25:59,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-02 22:25:59,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715586255] [2021-11-02 22:25:59,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:59,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:59,033 INFO L87 Difference]: Start difference. First operand 144 states and 169 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:59,205 INFO L93 Difference]: Finished difference Result 316 states and 349 transitions. [2021-11-02 22:25:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:25:59,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 22:25:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:59,207 INFO L225 Difference]: With dead ends: 316 [2021-11-02 22:25:59,207 INFO L226 Difference]: Without dead ends: 197 [2021-11-02 22:25:59,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-02 22:25:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 150. [2021-11-02 22:25:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 149 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) [2021-11-02 22:25:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 176 transitions. [2021-11-02 22:25:59,220 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 176 transitions. Word has length 80 [2021-11-02 22:25:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:59,220 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 176 transitions. [2021-11-02 22:25:59,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 176 transitions. [2021-11-02 22:25:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:25:59,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:59,222 INFO L513 BasicCegarLoop]: trace histogram [66, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:59,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-02 22:25:59,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:25:59,432 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:59,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:59,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1457746380, now seen corresponding path program 24 times [2021-11-02 22:25:59,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:59,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188228636] [2021-11-02 22:25:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:59,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:59,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:25:59,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887685349] [2021-11-02 22:25:59,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:25:59,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:59,444 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:59,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:28:49,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-11-02 22:28:49,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:49,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 22:28:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 1593 proven. 253 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2021-11-02 22:28:50,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:50,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188228636] [2021-11-02 22:28:50,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:50,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887685349] [2021-11-02 22:28:50,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887685349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:50,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:50,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-02 22:28:50,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201794825] [2021-11-02 22:28:50,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:28:50,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:50,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:28:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:28:50,082 INFO L87 Difference]: Start difference. First operand 150 states and 176 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2021-11-02 22:28:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:50,250 INFO L93 Difference]: Finished difference Result 329 states and 363 transitions. [2021-11-02 22:28:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:28:50,251 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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 83 [2021-11-02 22:28:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:50,252 INFO L225 Difference]: With dead ends: 329 [2021-11-02 22:28:50,252 INFO L226 Difference]: Without dead ends: 205 [2021-11-02 22:28:50,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:28:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-02 22:28:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-11-02 22:28:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1806451612903226) internal successors, (183), 155 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 183 transitions. [2021-11-02 22:28:50,266 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 183 transitions. Word has length 83 [2021-11-02 22:28:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:50,266 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 183 transitions. [2021-11-02 22:28:50,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 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) [2021-11-02 22:28:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 183 transitions. [2021-11-02 22:28:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:28:50,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:50,275 INFO L513 BasicCegarLoop]: trace histogram [69, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:50,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:50,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:28:50,500 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:50,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1662974222, now seen corresponding path program 25 times [2021-11-02 22:28:50,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:50,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177952496] [2021-11-02 22:28:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:50,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:50,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:50,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129701127] [2021-11-02 22:28:50,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:28:50,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:50,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:50,511 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:50,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:28:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:50,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:28:50,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 1155 proven. 276 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2021-11-02 22:28:51,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:51,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177952496] [2021-11-02 22:28:51,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:51,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129701127] [2021-11-02 22:28:51,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129701127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:51,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:51,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-02 22:28:51,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141642977] [2021-11-02 22:28:51,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:28:51,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:51,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:28:51,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:28:51,509 INFO L87 Difference]: Start difference. First operand 156 states and 183 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2021-11-02 22:28:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:51,673 INFO L93 Difference]: Finished difference Result 342 states and 377 transitions. [2021-11-02 22:28:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:28:51,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-02 22:28:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:51,675 INFO L225 Difference]: With dead ends: 342 [2021-11-02 22:28:51,675 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 22:28:51,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:28:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 22:28:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 162. [2021-11-02 22:28:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 161 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2021-11-02 22:28:51,689 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 86 [2021-11-02 22:28:51,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:51,689 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2021-11-02 22:28:51,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2021-11-02 22:28:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2021-11-02 22:28:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:28:51,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:51,690 INFO L513 BasicCegarLoop]: trace histogram [72, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:51,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:51,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:28:51,921 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash -406297716, now seen corresponding path program 26 times [2021-11-02 22:28:51,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:51,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135439991] [2021-11-02 22:28:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:51,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:51,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:51,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286492343] [2021-11-02 22:28:51,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:28:51,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:51,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:51,940 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:51,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:28:52,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:28:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:28:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2784 backedges. 1253 proven. 300 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2021-11-02 22:28:53,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:53,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135439991] [2021-11-02 22:28:53,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:28:53,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286492343] [2021-11-02 22:28:53,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286492343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:53,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:28:53,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-02 22:28:53,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852340547] [2021-11-02 22:28:53,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:28:53,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:28:53,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:28:53,175 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:53,359 INFO L93 Difference]: Finished difference Result 355 states and 391 transitions. [2021-11-02 22:28:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:28:53,359 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 22:28:53,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:53,361 INFO L225 Difference]: With dead ends: 355 [2021-11-02 22:28:53,361 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 22:28:53,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:28:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 22:28:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2021-11-02 22:28:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 167 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2021-11-02 22:28:53,376 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 89 [2021-11-02 22:28:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:53,376 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2021-11-02 22:28:53,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2021-11-02 22:28:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 22:28:53,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:53,377 INFO L513 BasicCegarLoop]: trace histogram [75, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:53,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:53,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:53,604 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1838501966, now seen corresponding path program 27 times [2021-11-02 22:28:53,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:53,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981401312] [2021-11-02 22:28:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:53,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:53,613 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:28:53,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491632388] [2021-11-02 22:28:53,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:28:53,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:53,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:53,615 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:53,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:31:50,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-02 22:31:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:31:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3012 backedges. 1357 proven. 325 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2021-11-02 22:31:51,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:51,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981401312] [2021-11-02 22:31:51,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:31:51,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491632388] [2021-11-02 22:31:51,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491632388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:51,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:31:51,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-02 22:31:51,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661591663] [2021-11-02 22:31:51,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:31:51,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:31:51,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:31:51,699 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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) [2021-11-02 22:31:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:51,890 INFO L93 Difference]: Finished difference Result 368 states and 405 transitions. [2021-11-02 22:31:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:31:51,891 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 92 [2021-11-02 22:31:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:51,892 INFO L225 Difference]: With dead ends: 368 [2021-11-02 22:31:51,892 INFO L226 Difference]: Without dead ends: 229 [2021-11-02 22:31:51,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:31:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-02 22:31:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 174. [2021-11-02 22:31:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1791907514450868) internal successors, (204), 173 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) [2021-11-02 22:31:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 204 transitions. [2021-11-02 22:31:51,907 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 204 transitions. Word has length 92 [2021-11-02 22:31:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:51,908 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 204 transitions. [2021-11-02 22:31:51,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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) [2021-11-02 22:31:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 204 transitions. [2021-11-02 22:31:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:31:51,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:51,909 INFO L513 BasicCegarLoop]: trace histogram [78, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:31:52,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:52,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:31:52,136 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:31:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1862990516, now seen corresponding path program 28 times [2021-11-02 22:31:52,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:52,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897248232] [2021-11-02 22:31:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:52,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:52,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:31:52,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125943298] [2021-11-02 22:31:52,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:31:52,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:52,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:52,162 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:52,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_145cf12e-b8cf-4a0f-b2f2-1ed827b2a144/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process