./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum60.i --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_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/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_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum60.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/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_58d7367e-37c6-47e9-a790-06783c59baec/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 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:18:25,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:18:25,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:18:25,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:18:25,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:18:25,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:18:25,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:18:25,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:18:25,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:18:25,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:18:25,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:18:25,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:18:25,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:18:25,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:18:25,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:18:25,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:18:25,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:18:25,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:18:25,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:18:25,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:18:25,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:18:25,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:18:25,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:18:25,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:18:25,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:18:25,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:18:25,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:18:25,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:18:25,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:18:25,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:18:25,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:18:25,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:18:25,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:18:25,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:18:25,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:18:25,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:18:25,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:18:25,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:18:25,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:18:25,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:18:25,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:18:25,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:18:25,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:18:25,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:18:25,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:18:25,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:18:25,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:18:25,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:18:25,664 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:18:25,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:18:25,665 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:18:25,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:18:25,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:18:25,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:18:25,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:18:25,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:18:25,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:18:25,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:18:25,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:18:25,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:18:25,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:18:25,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:18:25,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:18:25,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:18:25,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:18:25,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:18:25,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:18:25,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:18:25,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:18:25,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:18:25,671 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:18:25,673 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:18:25,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:18:25,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:18:25,674 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_58d7367e-37c6-47e9-a790-06783c59baec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2021-11-02 23:18:25,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:18:26,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:18:26,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:18:26,024 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:18:26,026 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:18:26,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/reducercommutativity/rangesum60.i [2021-11-02 23:18:26,096 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/data/114f46159/13b82397b6144ec2aa606539b03f1af2/FLAG6215f08a6 [2021-11-02 23:18:26,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:18:26,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/sv-benchmarks/c/reducercommutativity/rangesum60.i [2021-11-02 23:18:26,681 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/data/114f46159/13b82397b6144ec2aa606539b03f1af2/FLAG6215f08a6 [2021-11-02 23:18:27,032 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/data/114f46159/13b82397b6144ec2aa606539b03f1af2 [2021-11-02 23:18:27,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:18:27,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:18:27,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:18:27,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:18:27,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:18:27,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b12f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27, skipping insertion in model container [2021-11-02 23:18:27,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:18:27,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:18:27,225 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_58d7367e-37c6-47e9-a790-06783c59baec/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2021-11-02 23:18:27,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:18:27,236 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:18:27,256 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_58d7367e-37c6-47e9-a790-06783c59baec/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2021-11-02 23:18:27,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:18:27,271 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:18:27,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27 WrapperNode [2021-11-02 23:18:27,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:18:27,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:18:27,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:18:27,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:18:27,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:18:27,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:18:27,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:18:27,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:18:27,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:18:27,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:18:27,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:18:27,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:18:27,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (1/1) ... [2021-11-02 23:18:27,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:18:27,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:27,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:18:27,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:18:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:18:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:18:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:18:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:18:27,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:18:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:18:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:18:27,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:18:27,914 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-02 23:18:27,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:18:27 BoogieIcfgContainer [2021-11-02 23:18:27,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:18:27,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:18:27,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:18:27,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:18:27,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:18:27" (1/3) ... [2021-11-02 23:18:27,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1278b70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:18:27, skipping insertion in model container [2021-11-02 23:18:27,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:27" (2/3) ... [2021-11-02 23:18:27,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1278b70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:18:27, skipping insertion in model container [2021-11-02 23:18:27,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:18:27" (3/3) ... [2021-11-02 23:18:27,939 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2021-11-02 23:18:27,944 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:18:27,944 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:18:28,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:18:28,020 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 23:18:28,020 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:18:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:18:28,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:28,055 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:28,055 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-11-02 23:18:28,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:28,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387107714] [2021-11-02 23:18:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:28,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:28,293 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 23:18:28,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:28,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387107714] [2021-11-02 23:18:28,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387107714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:28,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:18:28,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:18:28,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986363157] [2021-11-02 23:18:28,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:18:28,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:18:28,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:18:28,321 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:28,364 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-11-02 23:18:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:18:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 23:18:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:28,375 INFO L225 Difference]: With dead ends: 58 [2021-11-02 23:18:28,375 INFO L226 Difference]: Without dead ends: 28 [2021-11-02 23:18:28,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:18:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-02 23:18:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-02 23:18:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-11-02 23:18:28,417 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-11-02 23:18:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:28,418 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-11-02 23:18:28,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-11-02 23:18:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:18:28,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:28,420 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:28,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:18:28,421 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:28,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-11-02 23:18:28,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:28,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849399404] [2021-11-02 23:18:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:28,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:28,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:28,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849399404] [2021-11-02 23:18:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849399404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:28,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288711608] [2021-11-02 23:18:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:28,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:28,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:28,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:28,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:18:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:18:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:18:28,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288711608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:28,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:28,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 23:18:28,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413523165] [2021-11-02 23:18:28,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:18:28,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:18:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:28,686 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:28,727 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-11-02 23:18:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:18:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 23:18:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:28,729 INFO L225 Difference]: With dead ends: 57 [2021-11-02 23:18:28,729 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 23:18:28,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 23:18:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-11-02 23:18:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-02 23:18:28,735 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-11-02 23:18:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:28,735 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-02 23:18:28,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-02 23:18:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:18:28,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:28,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:28,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:28,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:28,953 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:28,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-11-02 23:18:28,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:28,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49642826] [2021-11-02 23:18:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:28,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:18:28,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:28,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49642826] [2021-11-02 23:18:28,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49642826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:28,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846725485] [2021-11-02 23:18:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:28,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:28,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:29,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:29,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:18:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:29,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:18:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:18:29,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846725485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:29,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:29,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 23:18:29,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533956981] [2021-11-02 23:18:29,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:18:29,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:18:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:29,154 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:29,167 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-11-02 23:18:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:18:29,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:18:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:29,168 INFO L225 Difference]: With dead ends: 46 [2021-11-02 23:18:29,169 INFO L226 Difference]: Without dead ends: 35 [2021-11-02 23:18:29,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-02 23:18:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-11-02 23:18:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-11-02 23:18:29,179 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-11-02 23:18:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:29,179 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-11-02 23:18:29,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-11-02 23:18:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:18:29,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:29,180 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:29,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:29,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:29,382 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-11-02 23:18:29,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:29,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433772137] [2021-11-02 23:18:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:29,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:18:29,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:29,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433772137] [2021-11-02 23:18:29,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433772137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:29,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866369010] [2021-11-02 23:18:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:29,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:29,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:29,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:29,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:18:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:18:29,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:18:29,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866369010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:29,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:29,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 23:18:29,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032500279] [2021-11-02 23:18:29,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:18:29,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:18:29,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:29,578 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:29,611 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-11-02 23:18:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:18:29,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 23:18:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:29,612 INFO L225 Difference]: With dead ends: 78 [2021-11-02 23:18:29,612 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 23:18:29,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 23:18:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-11-02 23:18:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-11-02 23:18:29,628 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-11-02 23:18:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:29,629 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-11-02 23:18:29,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-11-02 23:18:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:18:29,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:29,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:29,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:29,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:29,840 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-11-02 23:18:29,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:29,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17311179] [2021-11-02 23:18:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:29,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:18:29,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:29,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17311179] [2021-11-02 23:18:29,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17311179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:29,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766893566] [2021-11-02 23:18:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:29,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:29,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:29,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:29,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:18:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:29,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:18:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:18:30,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766893566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:30,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:30,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:18:30,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069455625] [2021-11-02 23:18:30,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:18:30,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:18:30,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:30,090 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:30,124 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-11-02 23:18:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:18:30,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 23:18:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:30,126 INFO L225 Difference]: With dead ends: 90 [2021-11-02 23:18:30,126 INFO L226 Difference]: Without dead ends: 49 [2021-11-02 23:18:30,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-02 23:18:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-11-02 23:18:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 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 23:18:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-11-02 23:18:30,132 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-11-02 23:18:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:30,132 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-11-02 23:18:30,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-11-02 23:18:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:18:30,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:30,134 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:30,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:30,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:30,344 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-11-02 23:18:30,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:30,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658775927] [2021-11-02 23:18:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:30,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:18:30,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:30,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658775927] [2021-11-02 23:18:30,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658775927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:30,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235034327] [2021-11-02 23:18:30,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:30,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:30,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:30,423 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:30,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:18:30,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 23:18:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:18:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:18:30,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235034327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:30,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:30,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-11-02 23:18:30,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942570543] [2021-11-02 23:18:30,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:18:30,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:18:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:18:30,755 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:30,810 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-11-02 23:18:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:18:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:18:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:30,812 INFO L225 Difference]: With dead ends: 114 [2021-11-02 23:18:30,812 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 23:18:30,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:18:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 23:18:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-11-02 23:18:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-11-02 23:18:30,824 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-11-02 23:18:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:30,824 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-11-02 23:18:30,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-11-02 23:18:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:18:30,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:30,826 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:30,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:31,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 23:18:31,044 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:31,045 INFO L85 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-11-02 23:18:31,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:31,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941021660] [2021-11-02 23:18:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:31,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:18:31,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:31,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941021660] [2021-11-02 23:18:31,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941021660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:31,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734899475] [2021-11-02 23:18:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:31,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:31,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:31,145 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:31,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:18:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:31,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:18:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:18:31,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734899475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:31,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:31,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-02 23:18:31,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876338560] [2021-11-02 23:18:31,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:18:31,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:18:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:18:31,367 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 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 23:18:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:31,465 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-11-02 23:18:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:18:31,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:18:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:31,468 INFO L225 Difference]: With dead ends: 162 [2021-11-02 23:18:31,469 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:18:31,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:18:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:18:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-11-02 23:18:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 89 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-11-02 23:18:31,493 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-11-02 23:18:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:31,493 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-11-02 23:18:31,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 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 23:18:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-11-02 23:18:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:18:31,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:31,495 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:31,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:31,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:31,722 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:31,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-11-02 23:18:31,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:31,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463857816] [2021-11-02 23:18:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:31,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:31,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:31,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502603262] [2021-11-02 23:18:31,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:31,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:31,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:31,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:18:31,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:31,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:31,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:18:31,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-02 23:18:32,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:32,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463857816] [2021-11-02 23:18:32,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:32,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502603262] [2021-11-02 23:18:32,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502603262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:32,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:32,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:18:32,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149570267] [2021-11-02 23:18:32,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:18:32,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:32,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:18:32,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:18:32,061 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:32,091 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-11-02 23:18:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:18:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 23:18:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:32,093 INFO L225 Difference]: With dead ends: 174 [2021-11-02 23:18:32,093 INFO L226 Difference]: Without dead ends: 93 [2021-11-02 23:18:32,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 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 23:18:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-02 23:18:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-11-02 23:18:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 91 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-11-02 23:18:32,110 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-11-02 23:18:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:32,110 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-11-02 23:18:32,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-11-02 23:18:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 23:18:32,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:32,116 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:32,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:32,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:32,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-11-02 23:18:32,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:32,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706595335] [2021-11-02 23:18:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:32,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 23:18:32,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:32,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706595335] [2021-11-02 23:18:32,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706595335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:32,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:18:32,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:18:32,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411347262] [2021-11-02 23:18:32,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:18:32,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:18:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:18:32,371 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 23:18:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:32,418 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-11-02 23:18:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:18:32,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 48 [2021-11-02 23:18:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:32,419 INFO L225 Difference]: With dead ends: 177 [2021-11-02 23:18:32,419 INFO L226 Difference]: Without dead ends: 108 [2021-11-02 23:18:32,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:18:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-02 23:18:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-11-02 23:18:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 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 23:18:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-11-02 23:18:32,428 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-11-02 23:18:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:32,429 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-11-02 23:18:32,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 23:18:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-11-02 23:18:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:18:32,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:32,431 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:32,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:18:32,432 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-11-02 23:18:32,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:32,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661288710] [2021-11-02 23:18:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:32,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:32,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:32,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992088397] [2021-11-02 23:18:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:32,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:32,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:32,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:18:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:18:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:18:32,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:32,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661288710] [2021-11-02 23:18:32,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:32,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992088397] [2021-11-02 23:18:32,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992088397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:32,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:32,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:18:32,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938367533] [2021-11-02 23:18:32,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:18:32,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:18:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:18:32,737 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 23:18:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:32,768 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-11-02 23:18:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:18:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 54 [2021-11-02 23:18:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:32,770 INFO L225 Difference]: With dead ends: 158 [2021-11-02 23:18:32,770 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 23:18:32,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 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 23:18:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 23:18:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-02 23:18:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 23:18:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-11-02 23:18:32,794 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-11-02 23:18:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:32,794 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-11-02 23:18:32,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 23:18:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-11-02 23:18:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:18:32,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:32,796 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:32,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:32,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:32,997 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:32,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-11-02 23:18:32,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:32,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494840653] [2021-11-02 23:18:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:32,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:33,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:33,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242764681] [2021-11-02 23:18:33,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:33,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:33,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:33,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:33,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:18:33,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:33,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:18:33,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:18:33,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494840653] [2021-11-02 23:18:33,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242764681] [2021-11-02 23:18:33,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242764681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:33,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:33,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:18:33,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38253709] [2021-11-02 23:18:33,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:18:33,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:18:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:18:33,384 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:33,414 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-11-02 23:18:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:18:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-02 23:18:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:33,416 INFO L225 Difference]: With dead ends: 160 [2021-11-02 23:18:33,416 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 23:18:33,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 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 23:18:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 23:18:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-02 23:18:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.197674418604651) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-11-02 23:18:33,434 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2021-11-02 23:18:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:33,437 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-11-02 23:18:33,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-11-02 23:18:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 23:18:33,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:33,439 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:33,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:33,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:33,640 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2021-11-02 23:18:33,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:33,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650426003] [2021-11-02 23:18:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:33,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:33,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:33,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99994443] [2021-11-02 23:18:33,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:33,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:33,658 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:33,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:18:33,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:18:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:33,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:18:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-02 23:18:33,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:33,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650426003] [2021-11-02 23:18:33,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:33,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99994443] [2021-11-02 23:18:33,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99994443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:33,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:18:33,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:18:33,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179767877] [2021-11-02 23:18:33,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:18:33,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:18:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:18:33,951 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 23:18:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:33,976 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-11-02 23:18:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:18:33,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 58 [2021-11-02 23:18:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:33,978 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:18:33,978 INFO L226 Difference]: Without dead ends: 68 [2021-11-02 23:18:33,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 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 23:18:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-02 23:18:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2021-11-02 23:18:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-02 23:18:33,982 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2021-11-02 23:18:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:33,982 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-02 23:18:33,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 23:18:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-02 23:18:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 23:18:33,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:33,984 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:34,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:34,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 23:18:34,212 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2021-11-02 23:18:34,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:34,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904258589] [2021-11-02 23:18:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:34,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:34,225 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:34,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596691590] [2021-11-02 23:18:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:34,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:34,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:34,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:34,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:18:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:34,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:18:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:18:34,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:34,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904258589] [2021-11-02 23:18:34,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:34,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596691590] [2021-11-02 23:18:34,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596691590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:34,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:34,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:18:34,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353862527] [2021-11-02 23:18:34,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:18:34,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:34,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:18:34,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:18:34,597 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:34,621 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-11-02 23:18:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:18:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-02 23:18:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:34,622 INFO L225 Difference]: With dead ends: 106 [2021-11-02 23:18:34,623 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 23:18:34,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 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 23:18:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 23:18:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-02 23:18:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-11-02 23:18:34,629 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2021-11-02 23:18:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:34,629 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-11-02 23:18:34,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-11-02 23:18:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:18:34,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:34,632 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:34,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-02 23:18:34,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:18:34,848 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2021-11-02 23:18:34,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:34,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753154473] [2021-11-02 23:18:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:34,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:34,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:34,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808926718] [2021-11-02 23:18:34,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:34,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:34,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:34,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:18:35,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:35,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:18:35,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:18:35,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:35,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753154473] [2021-11-02 23:18:35,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:35,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808926718] [2021-11-02 23:18:35,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808926718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:35,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:35,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:18:35,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863016130] [2021-11-02 23:18:35,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:18:35,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:18:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:18:35,258 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:35,291 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-11-02 23:18:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:18:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-02 23:18:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:35,292 INFO L225 Difference]: With dead ends: 108 [2021-11-02 23:18:35,292 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:18:35,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 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 23:18:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:18:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-02 23:18:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-11-02 23:18:35,298 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2021-11-02 23:18:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:35,299 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-11-02 23:18:35,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-11-02 23:18:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 23:18:35,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:35,300 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:35,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:35,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 23:18:35,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2021-11-02 23:18:35,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:35,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004469189] [2021-11-02 23:18:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:35,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:35,547 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:35,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332346299] [2021-11-02 23:18:35,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:35,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:35,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:35,549 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:35,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:18:35,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:18:35,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:18:35,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 23:18:35,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:35,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004469189] [2021-11-02 23:18:35,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:35,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332346299] [2021-11-02 23:18:35,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332346299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:35,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:35,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-02 23:18:35,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181970385] [2021-11-02 23:18:35,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:18:35,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:18:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:18:35,925 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 23:18:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:35,945 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-11-02 23:18:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:18:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 23:18:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:35,948 INFO L225 Difference]: With dead ends: 82 [2021-11-02 23:18:35,948 INFO L226 Difference]: Without dead ends: 66 [2021-11-02 23:18:35,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 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 23:18:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-02 23:18:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-02 23:18:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-02 23:18:35,955 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2021-11-02 23:18:35,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:35,955 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-02 23:18:35,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 23:18:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-02 23:18:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:18:35,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:35,956 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:35,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:36,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:18:36,172 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2021-11-02 23:18:36,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:36,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256996609] [2021-11-02 23:18:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:36,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:36,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:36,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339575208] [2021-11-02 23:18:36,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:36,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:36,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:36,191 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:36,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:18:36,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:36,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:36,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:18:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-02 23:18:36,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:36,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256996609] [2021-11-02 23:18:36,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:36,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339575208] [2021-11-02 23:18:36,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339575208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:36,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:36,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 23:18:36,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207646745] [2021-11-02 23:18:36,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:18:36,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:18:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:36,602 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 23:18:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:36,664 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2021-11-02 23:18:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:18:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 64 [2021-11-02 23:18:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:36,665 INFO L225 Difference]: With dead ends: 117 [2021-11-02 23:18:36,665 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 23:18:36,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 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 23:18:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 23:18:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-11-02 23:18:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 23:18:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-11-02 23:18:36,670 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2021-11-02 23:18:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:36,672 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-11-02 23:18:36,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 23:18:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-11-02 23:18:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 23:18:36,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:36,678 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:36,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:36,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:36,892 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2021-11-02 23:18:36,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:36,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221493715] [2021-11-02 23:18:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:36,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:36,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:36,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341314633] [2021-11-02 23:18:36,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:36,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:36,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:36,909 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:36,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:18:37,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-02 23:18:37,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:37,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:18:37,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-02 23:18:37,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:37,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221493715] [2021-11-02 23:18:37,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:37,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341314633] [2021-11-02 23:18:37,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341314633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:37,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:37,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:18:37,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389406761] [2021-11-02 23:18:37,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:18:37,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:37,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:18:37,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:18:37,378 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:37,442 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-11-02 23:18:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:18:37,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-02 23:18:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:37,444 INFO L225 Difference]: With dead ends: 132 [2021-11-02 23:18:37,444 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 23:18:37,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 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 23:18:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 23:18:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-11-02 23:18:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-11-02 23:18:37,449 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2021-11-02 23:18:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:37,449 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-11-02 23:18:37,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:37,450 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-11-02 23:18:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 23:18:37,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:37,450 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:37,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:37,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:37,651 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2021-11-02 23:18:37,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:37,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751307641] [2021-11-02 23:18:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:37,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:37,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:37,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055679824] [2021-11-02 23:18:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:37,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:37,673 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:37,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:18:38,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 23:18:38,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:18:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-02 23:18:38,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:38,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751307641] [2021-11-02 23:18:38,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:38,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055679824] [2021-11-02 23:18:38,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055679824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:38,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:38,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 23:18:38,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189069453] [2021-11-02 23:18:38,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:18:38,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:18:38,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:38,412 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:38,429 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-11-02 23:18:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:18:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 23:18:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:38,430 INFO L225 Difference]: With dead ends: 108 [2021-11-02 23:18:38,431 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 23:18:38,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 23:18:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 23:18:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-02 23:18:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 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 23:18:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-11-02 23:18:38,436 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2021-11-02 23:18:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:38,436 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-11-02 23:18:38,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-11-02 23:18:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 23:18:38,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:38,449 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:38,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:38,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:18:38,676 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:38,676 INFO L85 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2021-11-02 23:18:38,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:38,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808620213] [2021-11-02 23:18:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:38,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:38,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:38,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732291843] [2021-11-02 23:18:38,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:38,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:38,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:38,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:38,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:18:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:18:38,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-02 23:18:39,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:39,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808620213] [2021-11-02 23:18:39,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:39,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732291843] [2021-11-02 23:18:39,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732291843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:39,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:39,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:18:39,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495066710] [2021-11-02 23:18:39,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:18:39,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:18:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:18:39,244 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:39,279 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-11-02 23:18:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:18:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 23:18:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:39,285 INFO L225 Difference]: With dead ends: 154 [2021-11-02 23:18:39,285 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 23:18:39,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 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 23:18:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 23:18:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-02 23:18:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 86 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-11-02 23:18:39,290 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2021-11-02 23:18:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:39,291 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-11-02 23:18:39,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-11-02 23:18:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 23:18:39,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:39,292 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:39,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:39,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:39,508 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2021-11-02 23:18:39,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:39,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065199687] [2021-11-02 23:18:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:39,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:39,521 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:39,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100156426] [2021-11-02 23:18:39,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:39,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:39,527 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:39,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:18:39,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:39,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:39,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:18:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-02 23:18:40,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:40,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065199687] [2021-11-02 23:18:40,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:40,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100156426] [2021-11-02 23:18:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100156426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:40,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:40,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 23:18:40,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161561841] [2021-11-02 23:18:40,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:18:40,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:18:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:18:40,068 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 23:18:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:40,107 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-11-02 23:18:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:18:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 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 23:18:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:40,108 INFO L225 Difference]: With dead ends: 156 [2021-11-02 23:18:40,108 INFO L226 Difference]: Without dead ends: 90 [2021-11-02 23:18:40,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:18:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-02 23:18:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-02 23:18:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-11-02 23:18:40,115 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2021-11-02 23:18:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:40,115 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-11-02 23:18:40,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 23:18:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-11-02 23:18:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 23:18:40,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:40,117 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:40,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:40,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:40,332 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:40,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2021-11-02 23:18:40,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:40,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866186725] [2021-11-02 23:18:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:40,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:40,357 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:40,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244781408] [2021-11-02 23:18:40,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:40,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:40,358 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:40,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:18:40,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:18:40,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:40,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:18:40,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-11-02 23:18:41,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:41,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866186725] [2021-11-02 23:18:41,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:41,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244781408] [2021-11-02 23:18:41,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244781408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:41,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:41,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 23:18:41,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30690273] [2021-11-02 23:18:41,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:18:41,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:18:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:41,207 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 23:18:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:41,269 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-11-02 23:18:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:18:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 88 [2021-11-02 23:18:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:41,271 INFO L225 Difference]: With dead ends: 153 [2021-11-02 23:18:41,271 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 23:18:41,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 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 23:18:41,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 23:18:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-11-02 23:18:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-11-02 23:18:41,279 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2021-11-02 23:18:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:41,279 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-11-02 23:18:41,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 23:18:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-11-02 23:18:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-02 23:18:41,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:41,281 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:41,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-02 23:18:41,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 23:18:41,504 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2021-11-02 23:18:41,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:41,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024503794] [2021-11-02 23:18:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:41,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:41,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:41,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873057024] [2021-11-02 23:18:41,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:41,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:41,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:41,519 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:41,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:18:41,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:41,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:41,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:18:41,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 23:18:42,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:42,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024503794] [2021-11-02 23:18:42,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:42,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873057024] [2021-11-02 23:18:42,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873057024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:42,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:42,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 23:18:42,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738910400] [2021-11-02 23:18:42,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:18:42,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:18:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:18:42,205 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 23:18:42,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:42,244 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2021-11-02 23:18:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:18:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-02 23:18:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:42,247 INFO L225 Difference]: With dead ends: 176 [2021-11-02 23:18:42,247 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 23:18:42,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:18:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 23:18:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-11-02 23:18:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-11-02 23:18:42,254 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 97 [2021-11-02 23:18:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:42,255 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-11-02 23:18:42,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 23:18:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-11-02 23:18:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-02 23:18:42,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:42,256 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:42,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:42,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 23:18:42,471 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash -839941325, now seen corresponding path program 11 times [2021-11-02 23:18:42,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:42,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263130841] [2021-11-02 23:18:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:42,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:42,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:42,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78595855] [2021-11-02 23:18:42,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:42,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:42,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:42,488 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:42,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:18:42,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:18:42,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:42,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:18:42,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-02 23:18:43,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:43,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263130841] [2021-11-02 23:18:43,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:43,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78595855] [2021-11-02 23:18:43,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78595855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:43,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:43,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:18:43,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077511471] [2021-11-02 23:18:43,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:18:43,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:18:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:18:43,148 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:43,249 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2021-11-02 23:18:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:18:43,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-02 23:18:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:43,251 INFO L225 Difference]: With dead ends: 175 [2021-11-02 23:18:43,251 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:18:43,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 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 23:18:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:18:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-11-02 23:18:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1018518518518519) internal successors, (119), 108 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-11-02 23:18:43,258 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 99 [2021-11-02 23:18:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:43,258 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-11-02 23:18:43,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-11-02 23:18:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-02 23:18:43,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:43,261 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:43,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-02 23:18:43,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:43,488 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1344803056, now seen corresponding path program 12 times [2021-11-02 23:18:43,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:43,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65144736] [2021-11-02 23:18:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:43,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:43,501 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:43,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963554614] [2021-11-02 23:18:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:43,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:43,507 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:43,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:18:44,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:18:44,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:18:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-02 23:18:44,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:44,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65144736] [2021-11-02 23:18:44,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:44,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963554614] [2021-11-02 23:18:44,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963554614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:44,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:44,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:18:44,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426960595] [2021-11-02 23:18:44,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:18:44,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:44,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:18:44,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:18:44,717 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 23:18:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:44,737 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-11-02 23:18:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:18:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 108 [2021-11-02 23:18:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:44,739 INFO L225 Difference]: With dead ends: 140 [2021-11-02 23:18:44,739 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:18:44,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 23:18:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:18:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-11-02 23:18:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 23:18:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-11-02 23:18:44,745 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 108 [2021-11-02 23:18:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:44,746 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-11-02 23:18:44,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 23:18:44,746 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-11-02 23:18:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-02 23:18:44,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:44,748 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:44,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:44,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:18:44,961 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2042426738, now seen corresponding path program 13 times [2021-11-02 23:18:44,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:44,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962861472] [2021-11-02 23:18:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:44,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:44,979 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:44,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013591076] [2021-11-02 23:18:44,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:44,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:44,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:44,981 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:45,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:18:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:18:45,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-02 23:18:45,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:45,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962861472] [2021-11-02 23:18:45,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:45,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013591076] [2021-11-02 23:18:45,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013591076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:45,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:45,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 23:18:45,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185203643] [2021-11-02 23:18:45,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:18:45,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:18:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:18:45,731 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:45,770 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2021-11-02 23:18:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:18:45,771 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-02 23:18:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:45,772 INFO L225 Difference]: With dead ends: 200 [2021-11-02 23:18:45,772 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 23:18:45,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:18:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 23:18:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-02 23:18:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0982142857142858) internal successors, (123), 112 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 23:18:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2021-11-02 23:18:45,778 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 110 [2021-11-02 23:18:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:45,778 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2021-11-02 23:18:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2021-11-02 23:18:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 23:18:45,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:45,780 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:45,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:46,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:46,008 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1265026804, now seen corresponding path program 14 times [2021-11-02 23:18:46,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:46,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193472474] [2021-11-02 23:18:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:46,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:46,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:46,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451789197] [2021-11-02 23:18:46,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:46,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:46,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:46,035 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:46,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:18:46,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:46,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:46,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:18:46,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-02 23:18:46,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:46,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193472474] [2021-11-02 23:18:46,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:46,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451789197] [2021-11-02 23:18:46,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451789197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:46,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:46,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 23:18:46,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948056377] [2021-11-02 23:18:46,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:18:46,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:18:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:18:46,840 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:46,879 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2021-11-02 23:18:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:18:46,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-02 23:18:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:46,881 INFO L225 Difference]: With dead ends: 202 [2021-11-02 23:18:46,881 INFO L226 Difference]: Without dead ends: 116 [2021-11-02 23:18:46,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:18:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-02 23:18:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-02 23:18:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 114 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-02 23:18:46,888 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 112 [2021-11-02 23:18:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:46,889 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-02 23:18:46,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-02 23:18:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 23:18:46,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:46,890 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:46,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:47,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:18:47,116 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1507999734, now seen corresponding path program 15 times [2021-11-02 23:18:47,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:47,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935073630] [2021-11-02 23:18:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:47,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:47,130 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:47,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471660262] [2021-11-02 23:18:47,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:47,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:47,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:47,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:47,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:18:47,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:18:47,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:18:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-02 23:18:48,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:48,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935073630] [2021-11-02 23:18:48,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:48,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471660262] [2021-11-02 23:18:48,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471660262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:48,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:48,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 23:18:48,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340111845] [2021-11-02 23:18:48,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:18:48,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:48,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:18:48,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:18:48,114 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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 23:18:48,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:48,206 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2021-11-02 23:18:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:18:48,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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 114 [2021-11-02 23:18:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:48,208 INFO L225 Difference]: With dead ends: 193 [2021-11-02 23:18:48,208 INFO L226 Difference]: Without dead ends: 130 [2021-11-02 23:18:48,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 23:18:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-02 23:18:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-11-02 23:18:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 23:18:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2021-11-02 23:18:48,212 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 114 [2021-11-02 23:18:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:48,212 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2021-11-02 23:18:48,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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 23:18:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2021-11-02 23:18:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 23:18:48,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:48,213 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:48,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:48,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:18:48,414 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:48,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:48,414 INFO L85 PathProgramCache]: Analyzing trace with hash 631086347, now seen corresponding path program 16 times [2021-11-02 23:18:48,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:48,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894458575] [2021-11-02 23:18:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:48,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:48,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:48,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582881020] [2021-11-02 23:18:48,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:48,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:48,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:48,428 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:18:49,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:49,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:18:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-02 23:18:49,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:49,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894458575] [2021-11-02 23:18:49,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:49,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582881020] [2021-11-02 23:18:49,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582881020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:49,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:49,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:18:49,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313136093] [2021-11-02 23:18:49,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:18:49,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:49,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:18:49,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:18:49,285 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:49,418 INFO L93 Difference]: Finished difference Result 217 states and 253 transitions. [2021-11-02 23:18:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:18:49,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-02 23:18:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:49,420 INFO L225 Difference]: With dead ends: 217 [2021-11-02 23:18:49,421 INFO L226 Difference]: Without dead ends: 148 [2021-11-02 23:18:49,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 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 23:18:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-02 23:18:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2021-11-02 23:18:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1418439716312057) internal successors, (161), 141 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 23:18:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 161 transitions. [2021-11-02 23:18:49,429 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 161 transitions. Word has length 123 [2021-11-02 23:18:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:49,430 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 161 transitions. [2021-11-02 23:18:49,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 161 transitions. [2021-11-02 23:18:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-02 23:18:49,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:49,431 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:49,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:49,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:18:49,647 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 830275947, now seen corresponding path program 17 times [2021-11-02 23:18:49,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:49,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954237706] [2021-11-02 23:18:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:49,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:49,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:49,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882975466] [2021-11-02 23:18:49,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:49,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:49,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:49,666 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:49,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:18:50,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-02 23:18:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:18:50,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 79 proven. 40 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-02 23:18:51,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:51,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954237706] [2021-11-02 23:18:51,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:51,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882975466] [2021-11-02 23:18:51,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882975466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:51,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:51,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:18:51,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166406191] [2021-11-02 23:18:51,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:18:51,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:18:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:18:51,031 INFO L87 Difference]: Start difference. First operand 142 states and 161 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 23:18:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:51,121 INFO L93 Difference]: Finished difference Result 252 states and 292 transitions. [2021-11-02 23:18:51,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:18:51,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 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 141 [2021-11-02 23:18:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:51,123 INFO L225 Difference]: With dead ends: 252 [2021-11-02 23:18:51,123 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 23:18:51,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 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 23:18:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 23:18:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-11-02 23:18:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1333333333333333) internal successors, (170), 150 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 23:18:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 170 transitions. [2021-11-02 23:18:51,129 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 170 transitions. Word has length 141 [2021-11-02 23:18:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:51,130 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 170 transitions. [2021-11-02 23:18:51,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 23:18:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 170 transitions. [2021-11-02 23:18:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-02 23:18:51,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:51,131 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:51,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:51,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:18:51,340 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2095940080, now seen corresponding path program 18 times [2021-11-02 23:18:51,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:51,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485368480] [2021-11-02 23:18:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:51,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:51,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:51,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931924293] [2021-11-02 23:18:51,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:51,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:51,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:51,384 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:51,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:18:52,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:18:52,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:52,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:18:52,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-11-02 23:18:52,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:52,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485368480] [2021-11-02 23:18:52,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:52,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931924293] [2021-11-02 23:18:52,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931924293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:52,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:52,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 23:18:52,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314821154] [2021-11-02 23:18:52,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:18:52,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:52,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:18:52,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:18:52,592 INFO L87 Difference]: Start difference. First operand 151 states and 170 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 23:18:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:52,613 INFO L93 Difference]: Finished difference Result 194 states and 219 transitions. [2021-11-02 23:18:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:18:52,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 150 [2021-11-02 23:18:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:52,615 INFO L225 Difference]: With dead ends: 194 [2021-11-02 23:18:52,615 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 23:18:52,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 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 23:18:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 23:18:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-02 23:18:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.131578947368421) internal successors, (172), 152 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 172 transitions. [2021-11-02 23:18:52,623 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 172 transitions. Word has length 150 [2021-11-02 23:18:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:52,623 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 172 transitions. [2021-11-02 23:18:52,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 23:18:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 172 transitions. [2021-11-02 23:18:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-02 23:18:52,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:52,625 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:52,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:52,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:52,844 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:52,844 INFO L85 PathProgramCache]: Analyzing trace with hash 703245042, now seen corresponding path program 19 times [2021-11-02 23:18:52,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:52,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435280002] [2021-11-02 23:18:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:52,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:52,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:52,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310123092] [2021-11-02 23:18:52,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:52,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:52,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:52,875 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:52,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:18:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:53,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:18:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-02 23:18:53,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:54,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435280002] [2021-11-02 23:18:54,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:54,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310123092] [2021-11-02 23:18:54,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310123092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:54,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:54,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 23:18:54,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487337221] [2021-11-02 23:18:54,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:18:54,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:18:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:18:54,002 INFO L87 Difference]: Start difference. First operand 153 states and 172 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 23:18:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:54,035 INFO L93 Difference]: Finished difference Result 280 states and 318 transitions. [2021-11-02 23:18:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:18:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-02 23:18:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:54,045 INFO L225 Difference]: With dead ends: 280 [2021-11-02 23:18:54,045 INFO L226 Difference]: Without dead ends: 156 [2021-11-02 23:18:54,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:18:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-02 23:18:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-02 23:18:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.12987012987013) internal successors, (174), 154 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2021-11-02 23:18:54,052 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 152 [2021-11-02 23:18:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:54,053 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2021-11-02 23:18:54,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 23:18:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2021-11-02 23:18:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-02 23:18:54,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:54,072 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:54,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 23:18:54,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-02 23:18:54,299 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1359382028, now seen corresponding path program 20 times [2021-11-02 23:18:54,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:54,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638367040] [2021-11-02 23:18:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:54,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:54,316 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:54,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308472186] [2021-11-02 23:18:54,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:54,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:54,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:54,318 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:54,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:18:54,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:54,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:18:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-02 23:18:55,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:55,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638367040] [2021-11-02 23:18:55,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:55,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308472186] [2021-11-02 23:18:55,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308472186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:55,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:55,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 23:18:55,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663712103] [2021-11-02 23:18:55,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:18:55,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:55,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:18:55,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:18:55,383 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:55,423 INFO L93 Difference]: Finished difference Result 282 states and 320 transitions. [2021-11-02 23:18:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:18:55,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-02 23:18:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:55,441 INFO L225 Difference]: With dead ends: 282 [2021-11-02 23:18:55,442 INFO L226 Difference]: Without dead ends: 158 [2021-11-02 23:18:55,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:18:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-02 23:18:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-11-02 23:18:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1282051282051282) internal successors, (176), 156 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 23:18:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 176 transitions. [2021-11-02 23:18:55,450 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 176 transitions. Word has length 154 [2021-11-02 23:18:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:55,451 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 176 transitions. [2021-11-02 23:18:55,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 176 transitions. [2021-11-02 23:18:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-02 23:18:55,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:55,453 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:55,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:55,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:55,668 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash 730894454, now seen corresponding path program 21 times [2021-11-02 23:18:55,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:55,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739386120] [2021-11-02 23:18:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:55,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:55,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:55,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901842771] [2021-11-02 23:18:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:55,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:55,702 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:55,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:18:56,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:18:56,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:56,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:18:56,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2021-11-02 23:18:57,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:57,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739386120] [2021-11-02 23:18:57,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:57,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901842771] [2021-11-02 23:18:57,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901842771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:57,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:57,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 23:18:57,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834624164] [2021-11-02 23:18:57,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:18:57,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:18:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:18:57,080 INFO L87 Difference]: Start difference. First operand 157 states and 176 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:57,126 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2021-11-02 23:18:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:18:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-02 23:18:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:57,128 INFO L225 Difference]: With dead ends: 200 [2021-11-02 23:18:57,128 INFO L226 Difference]: Without dead ends: 160 [2021-11-02 23:18:57,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 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 23:18:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-02 23:18:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-11-02 23:18:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1265822784810127) internal successors, (178), 158 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 23:18:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 178 transitions. [2021-11-02 23:18:57,136 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 178 transitions. Word has length 156 [2021-11-02 23:18:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:57,137 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 178 transitions. [2021-11-02 23:18:57,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 178 transitions. [2021-11-02 23:18:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 23:18:57,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:57,138 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:57,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-02 23:18:57,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:57,364 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1140576264, now seen corresponding path program 22 times [2021-11-02 23:18:57,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:57,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246475650] [2021-11-02 23:18:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:57,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:57,379 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:57,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072612129] [2021-11-02 23:18:57,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:57,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:57,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:57,380 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:57,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:18:58,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:58,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:58,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:18:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 84 proven. 77 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-11-02 23:18:58,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:58,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246475650] [2021-11-02 23:18:58,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:18:58,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072612129] [2021-11-02 23:18:58,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072612129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:58,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:58,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:18:58,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109273109] [2021-11-02 23:18:58,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:18:58,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:18:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:18:58,488 INFO L87 Difference]: Start difference. First operand 159 states and 178 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:58,627 INFO L93 Difference]: Finished difference Result 283 states and 335 transitions. [2021-11-02 23:18:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:18:58,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-02 23:18:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:58,629 INFO L225 Difference]: With dead ends: 283 [2021-11-02 23:18:58,629 INFO L226 Difference]: Without dead ends: 192 [2021-11-02 23:18:58,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 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 23:18:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-02 23:18:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 186. [2021-11-02 23:18:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.1567567567567567) internal successors, (214), 185 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2021-11-02 23:18:58,639 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 158 [2021-11-02 23:18:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:58,639 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2021-11-02 23:18:58,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2021-11-02 23:18:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-02 23:18:58,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:58,642 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 8, 8, 8, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:58,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-02 23:18:58,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:18:58,853 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1102235163, now seen corresponding path program 23 times [2021-11-02 23:18:58,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:58,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220720174] [2021-11-02 23:18:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:58,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:58,885 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:18:58,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511803082] [2021-11-02 23:18:58,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:58,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:58,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:58,895 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:58,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:19:00,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-02 23:19:00,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:19:00,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 153 proven. 57 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2021-11-02 23:19:01,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:01,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220720174] [2021-11-02 23:19:01,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:01,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511803082] [2021-11-02 23:19:01,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511803082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:01,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:01,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:19:01,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119887497] [2021-11-02 23:19:01,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:19:01,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:01,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:19:01,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:19:01,045 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:01,145 INFO L93 Difference]: Finished difference Result 333 states and 391 transitions. [2021-11-02 23:19:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:19:01,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-02 23:19:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:01,147 INFO L225 Difference]: With dead ends: 333 [2021-11-02 23:19:01,148 INFO L226 Difference]: Without dead ends: 198 [2021-11-02 23:19:01,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 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 23:19:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-02 23:19:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2021-11-02 23:19:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1494845360824741) internal successors, (223), 194 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 23:19:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 223 transitions. [2021-11-02 23:19:01,156 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 223 transitions. Word has length 185 [2021-11-02 23:19:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:01,156 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 223 transitions. [2021-11-02 23:19:01,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 223 transitions. [2021-11-02 23:19:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-02 23:19:01,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:01,158 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:01,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:01,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:01,384 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:01,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash -476618050, now seen corresponding path program 24 times [2021-11-02 23:19:01,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:01,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760155146] [2021-11-02 23:19:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:01,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:01,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:01,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945825274] [2021-11-02 23:19:01,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:01,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:01,416 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:01,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:19:02,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:19:02,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:19:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2021-11-02 23:19:03,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:03,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760155146] [2021-11-02 23:19:03,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:03,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945825274] [2021-11-02 23:19:03,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945825274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:03,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:03,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:19:03,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16252015] [2021-11-02 23:19:03,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:19:03,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:03,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:19:03,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:19:03,349 INFO L87 Difference]: Start difference. First operand 195 states and 223 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:03,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:03,378 INFO L93 Difference]: Finished difference Result 250 states and 287 transitions. [2021-11-02 23:19:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:19:03,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-11-02 23:19:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:03,380 INFO L225 Difference]: With dead ends: 250 [2021-11-02 23:19:03,380 INFO L226 Difference]: Without dead ends: 198 [2021-11-02 23:19:03,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 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 23:19:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-02 23:19:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-11-02 23:19:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.1479591836734695) internal successors, (225), 196 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 23:19:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 225 transitions. [2021-11-02 23:19:03,401 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 225 transitions. Word has length 194 [2021-11-02 23:19:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:03,401 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 225 transitions. [2021-11-02 23:19:03,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 225 transitions. [2021-11-02 23:19:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-02 23:19:03,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:03,404 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:03,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:03,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 23:19:03,622 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:03,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1768483392, now seen corresponding path program 25 times [2021-11-02 23:19:03,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:03,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149939444] [2021-11-02 23:19:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:03,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:03,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:03,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907489654] [2021-11-02 23:19:03,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:03,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:03,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:03,641 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:03,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:19:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:19:04,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2021-11-02 23:19:05,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:05,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149939444] [2021-11-02 23:19:05,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:05,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907489654] [2021-11-02 23:19:05,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907489654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:05,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:05,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 23:19:05,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727276158] [2021-11-02 23:19:05,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:19:05,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:19:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:19:05,035 INFO L87 Difference]: Start difference. First operand 197 states and 225 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:05,091 INFO L93 Difference]: Finished difference Result 364 states and 420 transitions. [2021-11-02 23:19:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:19:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-02 23:19:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:05,101 INFO L225 Difference]: With dead ends: 364 [2021-11-02 23:19:05,101 INFO L226 Difference]: Without dead ends: 200 [2021-11-02 23:19:05,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 179 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 23:19:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-02 23:19:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-02 23:19:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1464646464646464) internal successors, (227), 198 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 23:19:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 227 transitions. [2021-11-02 23:19:05,109 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 227 transitions. Word has length 196 [2021-11-02 23:19:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:05,110 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 227 transitions. [2021-11-02 23:19:05,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 227 transitions. [2021-11-02 23:19:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-02 23:19:05,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:05,112 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:05,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:05,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:19:05,340 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:05,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1898768834, now seen corresponding path program 26 times [2021-11-02 23:19:05,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:05,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529175630] [2021-11-02 23:19:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:05,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:05,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:05,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106351476] [2021-11-02 23:19:05,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:05,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:05,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:05,360 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:05,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:19:06,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:06,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:19:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2021-11-02 23:19:06,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:06,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529175630] [2021-11-02 23:19:06,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:06,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106351476] [2021-11-02 23:19:06,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106351476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:06,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:06,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 23:19:06,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650715040] [2021-11-02 23:19:06,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:19:06,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:19:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:19:06,896 INFO L87 Difference]: Start difference. First operand 199 states and 227 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:06,941 INFO L93 Difference]: Finished difference Result 366 states and 422 transitions. [2021-11-02 23:19:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:19:06,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-11-02 23:19:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:06,945 INFO L225 Difference]: With dead ends: 366 [2021-11-02 23:19:06,946 INFO L226 Difference]: Without dead ends: 202 [2021-11-02 23:19:06,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 180 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 23:19:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-02 23:19:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-11-02 23:19:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.145) internal successors, (229), 200 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 23:19:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 229 transitions. [2021-11-02 23:19:06,953 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 229 transitions. Word has length 198 [2021-11-02 23:19:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:06,954 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 229 transitions. [2021-11-02 23:19:06,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 229 transitions. [2021-11-02 23:19:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-02 23:19:06,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:06,955 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 15, 15, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:06,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:07,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:07,160 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash -39991996, now seen corresponding path program 27 times [2021-11-02 23:19:07,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:07,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116517420] [2021-11-02 23:19:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:07,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:07,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:07,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872028022] [2021-11-02 23:19:07,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:07,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:07,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:07,184 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:07,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:19:08,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:19:08,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:08,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:19:08,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1279 trivial. 0 not checked. [2021-11-02 23:19:09,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116517420] [2021-11-02 23:19:09,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872028022] [2021-11-02 23:19:09,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872028022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:09,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:09,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:19:09,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760924714] [2021-11-02 23:19:09,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:19:09,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:19:09,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:19:09,114 INFO L87 Difference]: Start difference. First operand 201 states and 229 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:09,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:09,138 INFO L93 Difference]: Finished difference Result 256 states and 293 transitions. [2021-11-02 23:19:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:19:09,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-02 23:19:09,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:09,140 INFO L225 Difference]: With dead ends: 256 [2021-11-02 23:19:09,140 INFO L226 Difference]: Without dead ends: 204 [2021-11-02 23:19:09,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 191 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 23:19:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-02 23:19:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-11-02 23:19:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.1435643564356435) internal successors, (231), 202 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 23:19:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 231 transitions. [2021-11-02 23:19:09,147 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 231 transitions. Word has length 200 [2021-11-02 23:19:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:09,148 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 231 transitions. [2021-11-02 23:19:09,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 231 transitions. [2021-11-02 23:19:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-02 23:19:09,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:09,150 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:09,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 23:19:09,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:09,364 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1217326790, now seen corresponding path program 28 times [2021-11-02 23:19:09,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:09,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297405544] [2021-11-02 23:19:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:09,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:09,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:09,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32232238] [2021-11-02 23:19:09,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:09,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:09,414 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:09,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:19:10,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:10,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:19:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1279 trivial. 0 not checked. [2021-11-02 23:19:10,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:10,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297405544] [2021-11-02 23:19:10,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:10,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32232238] [2021-11-02 23:19:10,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32232238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:10,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:10,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:19:10,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289049153] [2021-11-02 23:19:10,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:19:10,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:19:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:19:10,850 INFO L87 Difference]: Start difference. First operand 203 states and 231 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:10,886 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2021-11-02 23:19:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:19:10,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-02 23:19:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:10,888 INFO L225 Difference]: With dead ends: 258 [2021-11-02 23:19:10,889 INFO L226 Difference]: Without dead ends: 206 [2021-11-02 23:19:10,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 192 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 23:19:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-02 23:19:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-11-02 23:19:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.142156862745098) internal successors, (233), 204 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 23:19:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 233 transitions. [2021-11-02 23:19:10,896 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 233 transitions. Word has length 202 [2021-11-02 23:19:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:10,897 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 233 transitions. [2021-11-02 23:19:10,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 233 transitions. [2021-11-02 23:19:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-02 23:19:10,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:10,899 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 15, 15, 9, 9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:10,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:11,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:19:11,124 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1680097336, now seen corresponding path program 29 times [2021-11-02 23:19:11,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:11,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832621582] [2021-11-02 23:19:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:11,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:11,144 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:11,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251609505] [2021-11-02 23:19:11,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:11,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:11,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:11,150 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:11,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:19:17,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 23:19:17,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:17,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:19:17,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 176 proven. 77 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-11-02 23:19:18,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:18,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832621582] [2021-11-02 23:19:18,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:18,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251609505] [2021-11-02 23:19:18,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251609505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:18,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:18,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 23:19:18,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542698731] [2021-11-02 23:19:18,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:19:18,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:18,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:19:18,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:19:18,114 INFO L87 Difference]: Start difference. First operand 205 states and 233 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:18,244 INFO L93 Difference]: Finished difference Result 364 states and 422 transitions. [2021-11-02 23:19:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:19:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-02 23:19:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:18,247 INFO L225 Difference]: With dead ends: 364 [2021-11-02 23:19:18,247 INFO L226 Difference]: Without dead ends: 217 [2021-11-02 23:19:18,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 195 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 23:19:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-02 23:19:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2021-11-02 23:19:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.136150234741784) internal successors, (242), 213 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 23:19:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 242 transitions. [2021-11-02 23:19:18,256 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 242 transitions. Word has length 204 [2021-11-02 23:19:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:18,256 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 242 transitions. [2021-11-02 23:19:18,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 242 transitions. [2021-11-02 23:19:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-02 23:19:18,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:18,259 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:18,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:18,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:18,484 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:18,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash 327600251, now seen corresponding path program 30 times [2021-11-02 23:19:18,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:18,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004821216] [2021-11-02 23:19:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:18,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:18,505 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:18,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278689250] [2021-11-02 23:19:18,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:18,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:18,509 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:18,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:19:21,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-02 23:19:21,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 199 proven. 100 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2021-11-02 23:19:22,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:22,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004821216] [2021-11-02 23:19:22,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:22,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278689250] [2021-11-02 23:19:22,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278689250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:22,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:22,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 23:19:22,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60662447] [2021-11-02 23:19:22,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:19:22,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:19:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:22,224 INFO L87 Difference]: Start difference. First operand 214 states and 242 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:22,424 INFO L93 Difference]: Finished difference Result 356 states and 411 transitions. [2021-11-02 23:19:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:19:22,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-11-02 23:19:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:22,426 INFO L225 Difference]: With dead ends: 356 [2021-11-02 23:19:22,426 INFO L226 Difference]: Without dead ends: 229 [2021-11-02 23:19:22,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-02 23:19:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 223. [2021-11-02 23:19:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.1441441441441442) internal successors, (254), 222 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 23:19:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2021-11-02 23:19:22,435 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 213 [2021-11-02 23:19:22,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:22,435 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2021-11-02 23:19:22,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2021-11-02 23:19:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-02 23:19:22,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:22,437 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:22,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:22,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:22,664 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 247467682, now seen corresponding path program 31 times [2021-11-02 23:19:22,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:22,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919788913] [2021-11-02 23:19:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:22,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:22,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:22,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724074324] [2021-11-02 23:19:22,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:22,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:22,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:22,693 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:22,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:19:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:23,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:19:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2021-11-02 23:19:24,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:24,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919788913] [2021-11-02 23:19:24,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:24,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724074324] [2021-11-02 23:19:24,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724074324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:24,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:24,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 23:19:24,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997939054] [2021-11-02 23:19:24,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:19:24,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:19:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:19:24,469 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:24,509 INFO L93 Difference]: Finished difference Result 412 states and 474 transitions. [2021-11-02 23:19:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:19:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-02 23:19:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:24,510 INFO L225 Difference]: With dead ends: 412 [2021-11-02 23:19:24,510 INFO L226 Difference]: Without dead ends: 226 [2021-11-02 23:19:24,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:19:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-02 23:19:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-11-02 23:19:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.1428571428571428) internal successors, (256), 224 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 23:19:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 256 transitions. [2021-11-02 23:19:24,516 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 256 transitions. Word has length 222 [2021-11-02 23:19:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:24,516 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 256 transitions. [2021-11-02 23:19:24,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 256 transitions. [2021-11-02 23:19:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-02 23:19:24,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:24,519 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:24,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-02 23:19:24,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 23:19:24,732 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1114176476, now seen corresponding path program 32 times [2021-11-02 23:19:24,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:24,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254154796] [2021-11-02 23:19:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:24,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:24,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:24,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824651554] [2021-11-02 23:19:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:24,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:24,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:24,773 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:24,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:19:26,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:26,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:19:26,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2021-11-02 23:19:26,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:26,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254154796] [2021-11-02 23:19:26,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:26,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824651554] [2021-11-02 23:19:26,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824651554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:26,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:26,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-02 23:19:26,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144950145] [2021-11-02 23:19:26,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:19:26,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:19:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:19:26,595 INFO L87 Difference]: Start difference. First operand 225 states and 256 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:26,667 INFO L93 Difference]: Finished difference Result 414 states and 476 transitions. [2021-11-02 23:19:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:19:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-02 23:19:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:26,687 INFO L225 Difference]: With dead ends: 414 [2021-11-02 23:19:26,687 INFO L226 Difference]: Without dead ends: 228 [2021-11-02 23:19:26,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:19:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-02 23:19:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-11-02 23:19:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.1415929203539823) internal successors, (258), 226 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 23:19:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 258 transitions. [2021-11-02 23:19:26,696 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 258 transitions. Word has length 224 [2021-11-02 23:19:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:26,697 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 258 transitions. [2021-11-02 23:19:26,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 258 transitions. [2021-11-02 23:19:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-02 23:19:26,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:26,699 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:26,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:26,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-02 23:19:26,920 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash 310812966, now seen corresponding path program 33 times [2021-11-02 23:19:26,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:26,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011304885] [2021-11-02 23:19:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:26,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:26,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:26,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072518404] [2021-11-02 23:19:26,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:26,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:26,953 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:26,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:19:28,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:19:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1636 trivial. 0 not checked. [2021-11-02 23:19:29,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:29,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011304885] [2021-11-02 23:19:29,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:29,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072518404] [2021-11-02 23:19:29,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072518404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:29,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:29,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 23:19:29,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424578820] [2021-11-02 23:19:29,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:19:29,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:29,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:19:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:29,534 INFO L87 Difference]: Start difference. First operand 227 states and 258 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 23:19:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:29,569 INFO L93 Difference]: Finished difference Result 288 states and 329 transitions. [2021-11-02 23:19:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:19:29,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 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 226 [2021-11-02 23:19:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:29,572 INFO L225 Difference]: With dead ends: 288 [2021-11-02 23:19:29,572 INFO L226 Difference]: Without dead ends: 230 [2021-11-02 23:19:29,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-02 23:19:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-11-02 23:19:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 23:19:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 260 transitions. [2021-11-02 23:19:29,580 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 260 transitions. Word has length 226 [2021-11-02 23:19:29,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:29,581 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 260 transitions. [2021-11-02 23:19:29,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 23:19:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 260 transitions. [2021-11-02 23:19:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-02 23:19:29,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:29,582 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 17, 17, 17, 10, 10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:29,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:29,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:29,808 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2134018008, now seen corresponding path program 34 times [2021-11-02 23:19:29,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:29,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372112961] [2021-11-02 23:19:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:29,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:29,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:29,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603267784] [2021-11-02 23:19:29,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:29,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:29,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:29,831 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:29,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:19:31,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:31,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:31,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:19:31,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2021-11-02 23:19:31,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:31,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372112961] [2021-11-02 23:19:31,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:31,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603267784] [2021-11-02 23:19:31,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603267784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:31,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:31,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 23:19:31,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841510418] [2021-11-02 23:19:31,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:19:31,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:19:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:19:31,944 INFO L87 Difference]: Start difference. First operand 229 states and 260 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 23:19:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:31,989 INFO L93 Difference]: Finished difference Result 420 states and 482 transitions. [2021-11-02 23:19:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:19:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 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 228 [2021-11-02 23:19:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:31,991 INFO L225 Difference]: With dead ends: 420 [2021-11-02 23:19:31,991 INFO L226 Difference]: Without dead ends: 232 [2021-11-02 23:19:31,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:19:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-02 23:19:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-11-02 23:19:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.1391304347826088) internal successors, (262), 230 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 262 transitions. [2021-11-02 23:19:31,999 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 262 transitions. Word has length 228 [2021-11-02 23:19:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:31,999 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 262 transitions. [2021-11-02 23:19:31,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 23:19:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 262 transitions. [2021-11-02 23:19:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-02 23:19:32,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:32,001 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 17, 17, 17, 17, 10, 10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:32,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-02 23:19:32,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 23:19:32,216 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1791149098, now seen corresponding path program 35 times [2021-11-02 23:19:32,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:32,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750007146] [2021-11-02 23:19:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:32,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:32,237 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:32,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151650091] [2021-11-02 23:19:32,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:32,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:32,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:32,240 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:32,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:19:48,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-02 23:19:48,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:19:48,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1775 backedges. 225 proven. 100 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2021-11-02 23:19:48,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:48,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750007146] [2021-11-02 23:19:48,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:48,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151650091] [2021-11-02 23:19:48,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151650091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:48,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:48,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 23:19:48,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534307962] [2021-11-02 23:19:48,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:19:48,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:19:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:19:48,836 INFO L87 Difference]: Start difference. First operand 231 states and 262 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:48,971 INFO L93 Difference]: Finished difference Result 407 states and 471 transitions. [2021-11-02 23:19:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:19:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2021-11-02 23:19:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:48,973 INFO L225 Difference]: With dead ends: 407 [2021-11-02 23:19:48,973 INFO L226 Difference]: Without dead ends: 243 [2021-11-02 23:19:48,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 220 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 23:19:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-02 23:19:48,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2021-11-02 23:19:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1338912133891212) internal successors, (271), 239 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 23:19:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2021-11-02 23:19:48,984 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 230 [2021-11-02 23:19:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:48,984 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2021-11-02 23:19:48,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2021-11-02 23:19:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-02 23:19:48,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:48,993 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:49,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:49,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:49,220 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:49,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1867532049, now seen corresponding path program 36 times [2021-11-02 23:19:49,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:49,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049215745] [2021-11-02 23:19:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:49,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:49,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:49,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657304390] [2021-11-02 23:19:49,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:49,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:49,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:49,264 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:49,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:19:55,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 23:19:55,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:55,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:55,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1931 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 1554 trivial. 0 not checked. [2021-11-02 23:19:56,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:56,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049215745] [2021-11-02 23:19:56,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:56,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657304390] [2021-11-02 23:19:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657304390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:56,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:56,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 23:19:56,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314435054] [2021-11-02 23:19:56,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:19:56,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:19:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:56,436 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:56,542 INFO L93 Difference]: Finished difference Result 422 states and 486 transitions. [2021-11-02 23:19:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:19:56,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-11-02 23:19:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:56,544 INFO L225 Difference]: With dead ends: 422 [2021-11-02 23:19:56,544 INFO L226 Difference]: Without dead ends: 252 [2021-11-02 23:19:56,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-02 23:19:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-11-02 23:19:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.1290322580645162) internal successors, (280), 248 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 23:19:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2021-11-02 23:19:56,551 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 239 [2021-11-02 23:19:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:56,552 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2021-11-02 23:19:56,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2021-11-02 23:19:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-02 23:19:56,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:56,554 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:56,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:56,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:19:56,768 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:56,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1241532298, now seen corresponding path program 37 times [2021-11-02 23:19:56,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:56,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416322546] [2021-11-02 23:19:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:56,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:56,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:56,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388089301] [2021-11-02 23:19:56,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:56,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:56,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:56,794 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:56,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:19:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:19:58,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2096 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1696 trivial. 0 not checked. [2021-11-02 23:19:58,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:58,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416322546] [2021-11-02 23:19:58,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:19:58,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388089301] [2021-11-02 23:19:58,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388089301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:58,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:19:58,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 23:19:58,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278406474] [2021-11-02 23:19:58,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:19:58,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:19:58,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:19:58,930 INFO L87 Difference]: Start difference. First operand 249 states and 280 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 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 23:19:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:58,984 INFO L93 Difference]: Finished difference Result 458 states and 520 transitions. [2021-11-02 23:19:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:19:58,984 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-11-02 23:19:58,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:58,985 INFO L225 Difference]: With dead ends: 458 [2021-11-02 23:19:58,985 INFO L226 Difference]: Without dead ends: 252 [2021-11-02 23:19:58,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:19:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-02 23:19:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-11-02 23:19:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.128) internal successors, (282), 250 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 23:19:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 282 transitions. [2021-11-02 23:19:58,993 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 282 transitions. Word has length 248 [2021-11-02 23:19:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:58,993 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 282 transitions. [2021-11-02 23:19:58,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 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 23:19:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 282 transitions. [2021-11-02 23:19:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-02 23:19:58,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:58,996 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 19, 19, 19, 19, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:59,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:59,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 23:19:59,224 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 696876684, now seen corresponding path program 38 times [2021-11-02 23:19:59,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:59,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228842837] [2021-11-02 23:19:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:59,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:59,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:19:59,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547972641] [2021-11-02 23:19:59,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:59,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:59,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:59,274 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:59,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:20:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:20:00,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1696 trivial. 0 not checked. [2021-11-02 23:20:01,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:01,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228842837] [2021-11-02 23:20:01,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:01,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547972641] [2021-11-02 23:20:01,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547972641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:01,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:01,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 23:20:01,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815044199] [2021-11-02 23:20:01,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:20:01,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:20:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:20:01,556 INFO L87 Difference]: Start difference. First operand 251 states and 282 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:01,622 INFO L93 Difference]: Finished difference Result 460 states and 522 transitions. [2021-11-02 23:20:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:20:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-02 23:20:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:01,623 INFO L225 Difference]: With dead ends: 460 [2021-11-02 23:20:01,623 INFO L226 Difference]: Without dead ends: 254 [2021-11-02 23:20:01,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 227 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 23:20:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-02 23:20:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-11-02 23:20:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.126984126984127) internal successors, (284), 252 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 23:20:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 284 transitions. [2021-11-02 23:20:01,632 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 284 transitions. Word has length 250 [2021-11-02 23:20:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:01,633 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 284 transitions. [2021-11-02 23:20:01,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 284 transitions. [2021-11-02 23:20:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-02 23:20:01,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:01,635 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 19, 19, 19, 19, 19, 19, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:01,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:01,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:20:01,848 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1268841742, now seen corresponding path program 39 times [2021-11-02 23:20:01,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:01,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682450091] [2021-11-02 23:20:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:01,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:01,871 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:01,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639058770] [2021-11-02 23:20:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:01,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:01,873 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:01,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:20:04,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 23:20:04,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:04,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:20:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2021-11-02 23:20:04,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:04,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682450091] [2021-11-02 23:20:04,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:04,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639058770] [2021-11-02 23:20:04,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639058770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:04,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:04,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 23:20:04,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695103649] [2021-11-02 23:20:04,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:20:04,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:20:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:20:04,841 INFO L87 Difference]: Start difference. First operand 253 states and 284 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 23:20:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:04,871 INFO L93 Difference]: Finished difference Result 320 states and 361 transitions. [2021-11-02 23:20:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:20:04,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 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 252 [2021-11-02 23:20:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:04,873 INFO L225 Difference]: With dead ends: 320 [2021-11-02 23:20:04,874 INFO L226 Difference]: Without dead ends: 256 [2021-11-02 23:20:04,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:20:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-02 23:20:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-11-02 23:20:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.125984251968504) internal successors, (286), 254 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 23:20:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2021-11-02 23:20:04,879 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 286 transitions. Word has length 252 [2021-11-02 23:20:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:04,880 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 286 transitions. [2021-11-02 23:20:04,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 23:20:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 286 transitions. [2021-11-02 23:20:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-02 23:20:04,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:04,882 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 19, 19, 19, 19, 19, 19, 11, 11, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:04,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:05,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:05,096 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:05,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1566363792, now seen corresponding path program 40 times [2021-11-02 23:20:05,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:05,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725658502] [2021-11-02 23:20:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:05,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:05,129 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:05,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744970724] [2021-11-02 23:20:05,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:20:05,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:05,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:05,148 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:05,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:20:06,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:20:06,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:06,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:20:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2201 backedges. 268 proven. 187 refuted. 0 times theorem prover too weak. 1746 trivial. 0 not checked. [2021-11-02 23:20:07,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:07,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725658502] [2021-11-02 23:20:07,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:07,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744970724] [2021-11-02 23:20:07,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744970724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:07,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:07,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 23:20:07,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956268584] [2021-11-02 23:20:07,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:20:07,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:07,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:20:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:20:07,439 INFO L87 Difference]: Start difference. First operand 255 states and 286 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:07,648 INFO L93 Difference]: Finished difference Result 437 states and 509 transitions. [2021-11-02 23:20:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:20:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-11-02 23:20:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:07,650 INFO L225 Difference]: With dead ends: 437 [2021-11-02 23:20:07,650 INFO L226 Difference]: Without dead ends: 288 [2021-11-02 23:20:07,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:20:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-02 23:20:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2021-11-02 23:20:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.1459074733096086) internal successors, (322), 281 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 23:20:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 322 transitions. [2021-11-02 23:20:07,660 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 322 transitions. Word has length 254 [2021-11-02 23:20:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:07,660 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 322 transitions. [2021-11-02 23:20:07,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 322 transitions. [2021-11-02 23:20:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-02 23:20:07,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:07,663 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 12, 12, 12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:07,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:07,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:07,876 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1772237043, now seen corresponding path program 41 times [2021-11-02 23:20:07,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:07,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124140770] [2021-11-02 23:20:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:07,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:07,904 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:07,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893638843] [2021-11-02 23:20:07,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:20:07,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:07,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:07,906 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:07,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:20:36,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-02 23:20:36,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:36,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:20:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 373 proven. 155 refuted. 0 times theorem prover too weak. 2222 trivial. 0 not checked. [2021-11-02 23:20:37,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:37,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124140770] [2021-11-02 23:20:37,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:37,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893638843] [2021-11-02 23:20:37,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893638843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:37,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:37,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 23:20:37,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384519024] [2021-11-02 23:20:37,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:20:37,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:20:37,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:20:37,146 INFO L87 Difference]: Start difference. First operand 282 states and 322 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 23:20:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:37,297 INFO L93 Difference]: Finished difference Result 499 states and 581 transitions. [2021-11-02 23:20:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:20:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2021-11-02 23:20:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:37,299 INFO L225 Difference]: With dead ends: 499 [2021-11-02 23:20:37,299 INFO L226 Difference]: Without dead ends: 294 [2021-11-02 23:20:37,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:20:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-02 23:20:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2021-11-02 23:20:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1413793103448275) internal successors, (331), 290 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 23:20:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 331 transitions. [2021-11-02 23:20:37,310 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 331 transitions. Word has length 281 [2021-11-02 23:20:37,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:37,310 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 331 transitions. [2021-11-02 23:20:37,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 23:20:37,311 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 331 transitions. [2021-11-02 23:20:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-02 23:20:37,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:37,313 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:37,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:37,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:37,528 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash 888759638, now seen corresponding path program 42 times [2021-11-02 23:20:37,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:37,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634805235] [2021-11-02 23:20:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:37,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:37,566 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:37,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447365796] [2021-11-02 23:20:37,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:20:37,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:37,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:37,567 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:37,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:20:44,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-02 23:20:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:20:44,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 424 proven. 301 refuted. 0 times theorem prover too weak. 2226 trivial. 0 not checked. [2021-11-02 23:20:45,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:45,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634805235] [2021-11-02 23:20:45,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:45,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447365796] [2021-11-02 23:20:45,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447365796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:45,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:45,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 23:20:45,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707702860] [2021-11-02 23:20:45,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:20:45,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:45,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:20:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:20:45,388 INFO L87 Difference]: Start difference. First operand 291 states and 331 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 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 23:20:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:45,790 INFO L93 Difference]: Finished difference Result 497 states and 584 transitions. [2021-11-02 23:20:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:20:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 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) Word has length 290 [2021-11-02 23:20:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:45,792 INFO L225 Difference]: With dead ends: 497 [2021-11-02 23:20:45,792 INFO L226 Difference]: Without dead ends: 324 [2021-11-02 23:20:45,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=462, Invalid=798, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:20:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-02 23:20:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2021-11-02 23:20:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.1577287066246056) internal successors, (367), 317 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 23:20:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 367 transitions. [2021-11-02 23:20:45,802 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 367 transitions. Word has length 290 [2021-11-02 23:20:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:45,802 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 367 transitions. [2021-11-02 23:20:45,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 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 23:20:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 367 transitions. [2021-11-02 23:20:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-02 23:20:45,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:45,805 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 22, 22, 15, 15, 15, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:45,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:46,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:46,020 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1791989557, now seen corresponding path program 43 times [2021-11-02 23:20:46,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:46,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172493644] [2021-11-02 23:20:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:46,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:46,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:46,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973055538] [2021-11-02 23:20:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:46,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:46,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:46,110 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:46,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:20:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:47,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:20:47,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2021-11-02 23:20:48,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:48,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172493644] [2021-11-02 23:20:48,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:48,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973055538] [2021-11-02 23:20:48,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973055538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:48,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:48,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-02 23:20:48,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390214111] [2021-11-02 23:20:48,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:20:48,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:20:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:20:48,912 INFO L87 Difference]: Start difference. First operand 318 states and 367 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:48,988 INFO L93 Difference]: Finished difference Result 592 states and 690 transitions. [2021-11-02 23:20:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:20:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 317 [2021-11-02 23:20:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:48,992 INFO L225 Difference]: With dead ends: 592 [2021-11-02 23:20:48,992 INFO L226 Difference]: Without dead ends: 321 [2021-11-02 23:20:48,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 293 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 23:20:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-02 23:20:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2021-11-02 23:20:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.1567398119122256) internal successors, (369), 319 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 23:20:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 369 transitions. [2021-11-02 23:20:49,005 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 369 transitions. Word has length 317 [2021-11-02 23:20:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:49,005 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 369 transitions. [2021-11-02 23:20:49,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 369 transitions. [2021-11-02 23:20:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-02 23:20:49,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:49,008 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 23, 23, 15, 15, 15, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:49,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:49,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:49,224 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1909084937, now seen corresponding path program 44 times [2021-11-02 23:20:49,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:49,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312349134] [2021-11-02 23:20:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:49,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:49,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:49,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529428128] [2021-11-02 23:20:49,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:20:49,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:49,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:49,313 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:49,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:20:51,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:51,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:20:51,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3653 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2021-11-02 23:20:52,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:52,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312349134] [2021-11-02 23:20:52,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:52,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529428128] [2021-11-02 23:20:52,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529428128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:52,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:52,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-02 23:20:52,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728234348] [2021-11-02 23:20:52,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:20:52,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:52,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:20:52,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:20:52,263 INFO L87 Difference]: Start difference. First operand 320 states and 369 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:52,344 INFO L93 Difference]: Finished difference Result 594 states and 692 transitions. [2021-11-02 23:20:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:20:52,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2021-11-02 23:20:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:52,347 INFO L225 Difference]: With dead ends: 594 [2021-11-02 23:20:52,347 INFO L226 Difference]: Without dead ends: 323 [2021-11-02 23:20:52,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 294 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 23:20:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-02 23:20:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2021-11-02 23:20:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.1557632398753894) internal successors, (371), 321 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 23:20:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 371 transitions. [2021-11-02 23:20:52,357 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 371 transitions. Word has length 319 [2021-11-02 23:20:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:52,358 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 371 transitions. [2021-11-02 23:20:52,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 371 transitions. [2021-11-02 23:20:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-02 23:20:52,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:52,360 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 24, 24, 15, 15, 15, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:52,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-02 23:20:52,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-02 23:20:52,572 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1886214713, now seen corresponding path program 45 times [2021-11-02 23:20:52,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:52,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060993109] [2021-11-02 23:20:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:52,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:52,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:52,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95602771] [2021-11-02 23:20:52,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:52,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:52,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:52,653 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:52,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 23:20:55,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:20:55,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:55,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:20:55,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 3579 trivial. 0 not checked. [2021-11-02 23:20:56,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:56,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060993109] [2021-11-02 23:20:56,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:20:56,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95602771] [2021-11-02 23:20:56,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95602771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:56,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:20:56,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 23:20:56,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698999910] [2021-11-02 23:20:56,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:20:56,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:20:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:20:56,529 INFO L87 Difference]: Start difference. First operand 322 states and 371 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:56,566 INFO L93 Difference]: Finished difference Result 410 states and 475 transitions. [2021-11-02 23:20:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:20:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-11-02 23:20:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:56,568 INFO L225 Difference]: With dead ends: 410 [2021-11-02 23:20:56,568 INFO L226 Difference]: Without dead ends: 325 [2021-11-02 23:20:56,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:20:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-02 23:20:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 324. [2021-11-02 23:20:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1547987616099071) internal successors, (373), 323 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 23:20:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 373 transitions. [2021-11-02 23:20:56,578 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 373 transitions. Word has length 321 [2021-11-02 23:20:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:56,578 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 373 transitions. [2021-11-02 23:20:56,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 373 transitions. [2021-11-02 23:20:56,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-02 23:20:56,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:56,581 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 24, 24, 15, 15, 15, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:56,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-02 23:20:56,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:56,796 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash -201036731, now seen corresponding path program 46 times [2021-11-02 23:20:56,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:56,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954734660] [2021-11-02 23:20:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:56,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:56,886 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:20:56,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212399054] [2021-11-02 23:20:56,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:20:56,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:56,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:56,888 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:56,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 23:20:59,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:20:59,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:59,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:20:59,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3147 trivial. 0 not checked. [2021-11-02 23:21:00,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:00,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954734660] [2021-11-02 23:21:00,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:21:00,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212399054] [2021-11-02 23:21:00,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212399054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:00,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:21:00,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-02 23:21:00,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22270231] [2021-11-02 23:21:00,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:21:00,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:21:00,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:21:00,456 INFO L87 Difference]: Start difference. First operand 324 states and 373 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 23:21:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:00,541 INFO L93 Difference]: Finished difference Result 600 states and 698 transitions. [2021-11-02 23:21:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:21:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 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 323 [2021-11-02 23:21:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:00,547 INFO L225 Difference]: With dead ends: 600 [2021-11-02 23:21:00,547 INFO L226 Difference]: Without dead ends: 327 [2021-11-02 23:21:00,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 297 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 23:21:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-02 23:21:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2021-11-02 23:21:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1538461538461537) internal successors, (375), 325 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 23:21:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 375 transitions. [2021-11-02 23:21:00,560 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 375 transitions. Word has length 323 [2021-11-02 23:21:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:00,561 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 375 transitions. [2021-11-02 23:21:00,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 23:21:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 375 transitions. [2021-11-02 23:21:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-02 23:21:00,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:00,564 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 15, 15, 15, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:00,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:00,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 23:21:00,779 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2076782595, now seen corresponding path program 47 times [2021-11-02 23:21:00,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:00,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156974064] [2021-11-02 23:21:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:00,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:00,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:21:00,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743703795] [2021-11-02 23:21:00,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:21:00,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:00,862 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:00,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 23:22:14,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-11-02 23:22:14,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:14,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:22:14,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3772 backedges. 513 proven. 187 refuted. 0 times theorem prover too weak. 3072 trivial. 0 not checked. [2021-11-02 23:22:15,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:15,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156974064] [2021-11-02 23:22:15,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:22:15,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743703795] [2021-11-02 23:22:15,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743703795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:15,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:22:15,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 23:22:15,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100324146] [2021-11-02 23:22:15,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:22:15,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:22:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:22:15,750 INFO L87 Difference]: Start difference. First operand 326 states and 375 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:15,912 INFO L93 Difference]: Finished difference Result 578 states and 678 transitions. [2021-11-02 23:22:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:22:15,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2021-11-02 23:22:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:15,914 INFO L225 Difference]: With dead ends: 578 [2021-11-02 23:22:15,914 INFO L226 Difference]: Without dead ends: 338 [2021-11-02 23:22:15,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:22:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-02 23:22:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 335. [2021-11-02 23:22:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.1497005988023952) internal successors, (384), 334 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 23:22:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 384 transitions. [2021-11-02 23:22:15,922 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 384 transitions. Word has length 325 [2021-11-02 23:22:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:15,923 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 384 transitions. [2021-11-02 23:22:15,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 384 transitions. [2021-11-02 23:22:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-02 23:22:15,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:15,925 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 25, 25, 15, 15, 15, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:15,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-02 23:22:16,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 23:22:16,140 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:22:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:16,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1973313368, now seen corresponding path program 48 times [2021-11-02 23:22:16,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:16,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330714322] [2021-11-02 23:22:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:16,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:16,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:22:16,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814093738] [2021-11-02 23:22:16,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:22:16,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:16,238 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:16,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 23:22:33,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-02 23:22:33,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:22:33,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 158 proven. 144 refuted. 0 times theorem prover too weak. 3707 trivial. 0 not checked. [2021-11-02 23:22:34,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:34,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330714322] [2021-11-02 23:22:34,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:22:34,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814093738] [2021-11-02 23:22:34,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814093738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:34,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:22:34,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 23:22:34,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109130325] [2021-11-02 23:22:34,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:22:34,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:22:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:22:34,398 INFO L87 Difference]: Start difference. First operand 335 states and 384 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:34,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:34,653 INFO L93 Difference]: Finished difference Result 426 states and 491 transitions. [2021-11-02 23:22:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:22:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2021-11-02 23:22:34,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:34,655 INFO L225 Difference]: With dead ends: 426 [2021-11-02 23:22:34,655 INFO L226 Difference]: Without dead ends: 338 [2021-11-02 23:22:34,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=552, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:22:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-02 23:22:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2021-11-02 23:22:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.1488095238095237) internal successors, (386), 336 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 23:22:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 386 transitions. [2021-11-02 23:22:34,697 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 386 transitions. Word has length 334 [2021-11-02 23:22:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:34,698 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 386 transitions. [2021-11-02 23:22:34,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 386 transitions. [2021-11-02 23:22:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-02 23:22:34,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:34,701 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 25, 25, 15, 15, 15, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:34,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:34,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-02 23:22:34,928 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:22:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash 799470170, now seen corresponding path program 49 times [2021-11-02 23:22:34,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:34,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532769133] [2021-11-02 23:22:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:34,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:34,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:22:34,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267550457] [2021-11-02 23:22:34,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:22:34,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:34,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:34,972 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:35,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 23:22:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:22:38,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3409 trivial. 0 not checked. [2021-11-02 23:22:39,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:39,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532769133] [2021-11-02 23:22:39,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:22:39,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267550457] [2021-11-02 23:22:39,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267550457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:39,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:22:39,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-02 23:22:39,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190930581] [2021-11-02 23:22:39,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:22:39,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:39,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:22:39,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:22:39,197 INFO L87 Difference]: Start difference. First operand 337 states and 386 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 23:22:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:39,273 INFO L93 Difference]: Finished difference Result 624 states and 722 transitions. [2021-11-02 23:22:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:22:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 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 336 [2021-11-02 23:22:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:39,275 INFO L225 Difference]: With dead ends: 624 [2021-11-02 23:22:39,275 INFO L226 Difference]: Without dead ends: 340 [2021-11-02 23:22:39,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 309 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 23:22:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-02 23:22:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 339. [2021-11-02 23:22:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.1479289940828403) internal successors, (388), 338 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 23:22:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 388 transitions. [2021-11-02 23:22:39,284 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 388 transitions. Word has length 336 [2021-11-02 23:22:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:39,284 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 388 transitions. [2021-11-02 23:22:39,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 23:22:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 388 transitions. [2021-11-02 23:22:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-02 23:22:39,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:39,286 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 26, 26, 15, 15, 15, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:39,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-02 23:22:39,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:39,492 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:22:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:39,493 INFO L85 PathProgramCache]: Analyzing trace with hash -107826340, now seen corresponding path program 50 times [2021-11-02 23:22:39,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:39,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231316839] [2021-11-02 23:22:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:39,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:39,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:22:39,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373881720] [2021-11-02 23:22:39,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:22:39,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:39,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:39,565 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:39,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 23:22:43,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:22:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:22:43,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4085 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3409 trivial. 0 not checked. [2021-11-02 23:22:44,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:44,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231316839] [2021-11-02 23:22:44,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:22:44,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373881720] [2021-11-02 23:22:44,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373881720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:44,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:22:44,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-02 23:22:44,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922996796] [2021-11-02 23:22:44,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:22:44,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:22:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:22:44,190 INFO L87 Difference]: Start difference. First operand 339 states and 388 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:44,288 INFO L93 Difference]: Finished difference Result 626 states and 724 transitions. [2021-11-02 23:22:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:22:44,288 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-11-02 23:22:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:44,290 INFO L225 Difference]: With dead ends: 626 [2021-11-02 23:22:44,290 INFO L226 Difference]: Without dead ends: 342 [2021-11-02 23:22:44,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 310 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 23:22:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-02 23:22:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2021-11-02 23:22:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.1470588235294117) internal successors, (390), 340 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 23:22:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 390 transitions. [2021-11-02 23:22:44,300 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 390 transitions. Word has length 338 [2021-11-02 23:22:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:44,300 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 390 transitions. [2021-11-02 23:22:44,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 390 transitions. [2021-11-02 23:22:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-02 23:22:44,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:44,303 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 15, 15, 15, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:44,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:44,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-02 23:22:44,507 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:22:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash -141411362, now seen corresponding path program 51 times [2021-11-02 23:22:44,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:44,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111480444] [2021-11-02 23:22:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:44,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:44,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:22:44,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699261640] [2021-11-02 23:22:44,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:22:44,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:44,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:44,589 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:44,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 23:22:50,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-02 23:22:50,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:50,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:22:50,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4138 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 3969 trivial. 0 not checked. [2021-11-02 23:22:51,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:51,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111480444] [2021-11-02 23:22:51,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:22:51,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699261640] [2021-11-02 23:22:51,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699261640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:51,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:22:51,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 23:22:51,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267054626] [2021-11-02 23:22:51,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:22:51,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:22:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:22:51,498 INFO L87 Difference]: Start difference. First operand 341 states and 390 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 23:22:51,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:51,587 INFO L93 Difference]: Finished difference Result 432 states and 497 transitions. [2021-11-02 23:22:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:22:51,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2021-11-02 23:22:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:51,589 INFO L225 Difference]: With dead ends: 432 [2021-11-02 23:22:51,589 INFO L226 Difference]: Without dead ends: 344 [2021-11-02 23:22:51,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:22:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-02 23:22:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2021-11-02 23:22:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.1461988304093567) internal successors, (392), 342 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 23:22:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 392 transitions. [2021-11-02 23:22:51,603 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 392 transitions. Word has length 340 [2021-11-02 23:22:51,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:51,603 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 392 transitions. [2021-11-02 23:22:51,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 23:22:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 392 transitions. [2021-11-02 23:22:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-02 23:22:51,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:51,607 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 15, 15, 15, 14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:51,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:51,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:51,831 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:22:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash 68535648, now seen corresponding path program 52 times [2021-11-02 23:22:51,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:51,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734967821] [2021-11-02 23:22:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:51,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:51,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:22:51,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328705466] [2021-11-02 23:22:51,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:22:51,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:51,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:51,930 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:51,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-02 23:22:55,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:22:55,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:22:55,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4165 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 3085 trivial. 0 not checked. [2021-11-02 23:22:56,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:56,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734967821] [2021-11-02 23:22:56,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:22:56,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328705466] [2021-11-02 23:22:56,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328705466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:56,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:22:56,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-02 23:22:56,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618275315] [2021-11-02 23:22:56,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:22:56,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:22:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:22:56,509 INFO L87 Difference]: Start difference. First operand 343 states and 392 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:56,970 INFO L93 Difference]: Finished difference Result 731 states and 873 transitions. [2021-11-02 23:22:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:22:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2021-11-02 23:22:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:56,974 INFO L225 Difference]: With dead ends: 731 [2021-11-02 23:22:56,974 INFO L226 Difference]: Without dead ends: 481 [2021-11-02 23:22:56,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 314 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 23:22:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-02 23:22:56,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2021-11-02 23:22:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.1048218029350105) internal successors, (527), 477 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 23:22:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 527 transitions. [2021-11-02 23:22:56,987 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 527 transitions. Word has length 342 [2021-11-02 23:22:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:56,987 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 527 transitions. [2021-11-02 23:22:56,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 527 transitions. [2021-11-02 23:22:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-02 23:22:56,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:56,992 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 27, 27, 27, 27, 27, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:57,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:57,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:57,216 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:22:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1113266309, now seen corresponding path program 53 times [2021-11-02 23:22:57,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:57,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369878692] [2021-11-02 23:22:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:57,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:57,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:22:57,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046309530] [2021-11-02 23:22:57,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:22:57,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:57,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:57,272 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:57,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-02 23:25:14,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-11-02 23:25:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:14,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:25:14,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8800 backedges. 1217 proven. 1107 refuted. 0 times theorem prover too weak. 6476 trivial. 0 not checked. [2021-11-02 23:25:15,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:15,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369878692] [2021-11-02 23:25:15,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:25:15,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046309530] [2021-11-02 23:25:15,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046309530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:15,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:25:15,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-02 23:25:15,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660344451] [2021-11-02 23:25:15,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:25:15,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:15,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:25:15,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:25:15,963 INFO L87 Difference]: Start difference. First operand 478 states and 527 transitions. Second operand has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:16,495 INFO L93 Difference]: Finished difference Result 830 states and 930 transitions. [2021-11-02 23:25:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:25:16,496 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2021-11-02 23:25:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:16,499 INFO L225 Difference]: With dead ends: 830 [2021-11-02 23:25:16,499 INFO L226 Difference]: Without dead ends: 490 [2021-11-02 23:25:16,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:25:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-02 23:25:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 487. [2021-11-02 23:25:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.102880658436214) internal successors, (536), 486 states have internal predecessors, (536), 0 states have call successors, (0), 0 states 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 23:25:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 536 transitions. [2021-11-02 23:25:16,516 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 536 transitions. Word has length 477 [2021-11-02 23:25:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:16,517 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 536 transitions. [2021-11-02 23:25:16,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 536 transitions. [2021-11-02 23:25:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-02 23:25:16,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:16,522 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 28, 28, 28, 27, 27, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:16,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-02 23:25:16,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-02 23:25:16,723 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:25:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1933644896, now seen corresponding path program 54 times [2021-11-02 23:25:16,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:16,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548292582] [2021-11-02 23:25:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:16,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:16,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:25:16,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989676776] [2021-11-02 23:25:16,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:25:16,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:16,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:16,809 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:16,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-02 23:25:25,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-02 23:25:25,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:25,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:25:25,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9181 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 8985 trivial. 0 not checked. [2021-11-02 23:25:26,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:26,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548292582] [2021-11-02 23:25:26,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:25:26,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989676776] [2021-11-02 23:25:26,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989676776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:26,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:25:26,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 23:25:26,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178745620] [2021-11-02 23:25:26,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:25:26,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:26,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:25:26,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:25:26,876 INFO L87 Difference]: Start difference. First operand 487 states and 536 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:26,960 INFO L93 Difference]: Finished difference Result 626 states and 691 transitions. [2021-11-02 23:25:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:25:26,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 486 [2021-11-02 23:25:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:26,965 INFO L225 Difference]: With dead ends: 626 [2021-11-02 23:25:26,965 INFO L226 Difference]: Without dead ends: 490 [2021-11-02 23:25:26,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 470 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 23:25:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-02 23:25:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 489. [2021-11-02 23:25:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.1024590163934427) internal successors, (538), 488 states have internal predecessors, (538), 0 states have call successors, (0), 0 states 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 23:25:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 538 transitions. [2021-11-02 23:25:26,985 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 538 transitions. Word has length 486 [2021-11-02 23:25:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:26,986 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 538 transitions. [2021-11-02 23:25:26,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 538 transitions. [2021-11-02 23:25:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-02 23:25:26,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:26,990 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 28, 28, 28, 27, 27, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:27,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:27,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-02 23:25:27,194 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:25:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash 449821026, now seen corresponding path program 55 times [2021-11-02 23:25:27,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:27,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296272818] [2021-11-02 23:25:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:27,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:27,244 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:25:27,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375455228] [2021-11-02 23:25:27,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:25:27,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:27,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:27,246 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:27,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-02 23:25:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:30,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:25:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9210 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 8481 trivial. 0 not checked. [2021-11-02 23:25:32,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:32,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296272818] [2021-11-02 23:25:32,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:25:32,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375455228] [2021-11-02 23:25:32,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375455228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:32,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:25:32,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-02 23:25:32,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173481864] [2021-11-02 23:25:32,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:25:32,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:25:32,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:25:32,571 INFO L87 Difference]: Start difference. First operand 489 states and 538 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 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 23:25:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:32,660 INFO L93 Difference]: Finished difference Result 924 states and 1022 transitions. [2021-11-02 23:25:32,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:25:32,661 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 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) Word has length 488 [2021-11-02 23:25:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:32,664 INFO L225 Difference]: With dead ends: 924 [2021-11-02 23:25:32,664 INFO L226 Difference]: Without dead ends: 492 [2021-11-02 23:25:32,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:25:32,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-02 23:25:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 491. [2021-11-02 23:25:32,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1020408163265305) internal successors, (540), 490 states have internal predecessors, (540), 0 states have call successors, (0), 0 states 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 23:25:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 540 transitions. [2021-11-02 23:25:32,682 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 540 transitions. Word has length 488 [2021-11-02 23:25:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:32,682 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 540 transitions. [2021-11-02 23:25:32,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 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 23:25:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 540 transitions. [2021-11-02 23:25:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-11-02 23:25:32,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:32,686 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 28, 28, 28, 28, 28, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:32,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:32,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-02 23:25:32,888 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:25:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:32,888 INFO L85 PathProgramCache]: Analyzing trace with hash 485946468, now seen corresponding path program 56 times [2021-11-02 23:25:32,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:32,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647758860] [2021-11-02 23:25:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:32,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:32,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:25:32,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142344106] [2021-11-02 23:25:32,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:25:32,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:32,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:32,938 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:32,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-02 23:25:36,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:25:36,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:25:36,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9265 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 8481 trivial. 0 not checked. [2021-11-02 23:25:38,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:38,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647758860] [2021-11-02 23:25:38,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:25:38,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142344106] [2021-11-02 23:25:38,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142344106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:38,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:25:38,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-02 23:25:38,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223442418] [2021-11-02 23:25:38,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:25:38,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:25:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:25:38,339 INFO L87 Difference]: Start difference. First operand 491 states and 540 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:38,428 INFO L93 Difference]: Finished difference Result 926 states and 1024 transitions. [2021-11-02 23:25:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:25:38,428 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 490 [2021-11-02 23:25:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:38,431 INFO L225 Difference]: With dead ends: 926 [2021-11-02 23:25:38,431 INFO L226 Difference]: Without dead ends: 494 [2021-11-02 23:25:38,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:25:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-02 23:25:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 493. [2021-11-02 23:25:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.1016260162601625) internal successors, (542), 492 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 23:25:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 542 transitions. [2021-11-02 23:25:38,454 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 542 transitions. Word has length 490 [2021-11-02 23:25:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:38,454 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 542 transitions. [2021-11-02 23:25:38,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:38,455 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 542 transitions. [2021-11-02 23:25:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-11-02 23:25:38,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:38,460 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 29, 29, 28, 28, 28, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:38,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:38,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-02 23:25:38,676 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:25:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash 842757862, now seen corresponding path program 57 times [2021-11-02 23:25:38,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:38,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205319751] [2021-11-02 23:25:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:38,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:38,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:25:38,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251529463] [2021-11-02 23:25:38,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:25:38,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:38,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:38,821 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:38,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-02 23:25:48,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:25:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:48,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:25:48,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9097 trivial. 0 not checked. [2021-11-02 23:25:49,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:49,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205319751] [2021-11-02 23:25:49,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:25:49,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251529463] [2021-11-02 23:25:49,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251529463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:49,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:25:49,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 23:25:49,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173855268] [2021-11-02 23:25:49,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:25:49,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:49,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:25:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:25:49,407 INFO L87 Difference]: Start difference. First operand 493 states and 542 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:49,496 INFO L93 Difference]: Finished difference Result 632 states and 697 transitions. [2021-11-02 23:25:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:25:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 492 [2021-11-02 23:25:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:49,501 INFO L225 Difference]: With dead ends: 632 [2021-11-02 23:25:49,501 INFO L226 Difference]: Without dead ends: 496 [2021-11-02 23:25:49,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 475 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 23:25:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-02 23:25:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 495. [2021-11-02 23:25:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.1012145748987854) internal successors, (544), 494 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 23:25:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 544 transitions. [2021-11-02 23:25:49,521 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 544 transitions. Word has length 492 [2021-11-02 23:25:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:49,522 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 544 transitions. [2021-11-02 23:25:49,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 544 transitions. [2021-11-02 23:25:49,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-11-02 23:25:49,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:49,527 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 29, 29, 28, 28, 28, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:49,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:49,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-02 23:25:49,744 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:25:49,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:49,744 INFO L85 PathProgramCache]: Analyzing trace with hash 79401576, now seen corresponding path program 58 times [2021-11-02 23:25:49,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:49,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871118040] [2021-11-02 23:25:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:49,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:49,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:25:49,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529281310] [2021-11-02 23:25:49,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:25:49,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:49,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:49,795 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:49,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-02 23:25:54,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:25:54,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:54,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:25:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9353 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 8512 trivial. 0 not checked. [2021-11-02 23:25:55,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:55,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871118040] [2021-11-02 23:25:55,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:25:55,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529281310] [2021-11-02 23:25:55,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529281310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:55,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:25:55,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-02 23:25:55,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337754856] [2021-11-02 23:25:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:25:55,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:25:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:25:55,614 INFO L87 Difference]: Start difference. First operand 495 states and 544 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:55,706 INFO L93 Difference]: Finished difference Result 932 states and 1030 transitions. [2021-11-02 23:25:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:25:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 494 [2021-11-02 23:25:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:55,709 INFO L225 Difference]: With dead ends: 932 [2021-11-02 23:25:55,709 INFO L226 Difference]: Without dead ends: 498 [2021-11-02 23:25:55,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:25:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-02 23:25:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 497. [2021-11-02 23:25:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.1008064516129032) internal successors, (546), 496 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 23:25:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 546 transitions. [2021-11-02 23:25:55,723 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 546 transitions. Word has length 494 [2021-11-02 23:25:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:55,723 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 546 transitions. [2021-11-02 23:25:55,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 546 transitions. [2021-11-02 23:25:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-11-02 23:25:55,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:55,726 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 30, 30, 28, 28, 28, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:55,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:55,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:55,927 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:25:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:55,928 INFO L85 PathProgramCache]: Analyzing trace with hash 118948842, now seen corresponding path program 59 times [2021-11-02 23:25:55,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:55,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613388629] [2021-11-02 23:25:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:55,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:55,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:25:55,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991133189] [2021-11-02 23:25:55,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:25:55,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:55,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:55,982 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:56,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-02 23:29:42,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2021-11-02 23:29:42,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:29:42,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:29:42,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:29:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9412 backedges. 1261 proven. 1190 refuted. 0 times theorem prover too weak. 6961 trivial. 0 not checked. [2021-11-02 23:29:44,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:29:44,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613388629] [2021-11-02 23:29:44,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:29:44,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991133189] [2021-11-02 23:29:44,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991133189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:29:44,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:29:44,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-02 23:29:44,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166171994] [2021-11-02 23:29:44,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:29:44,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:29:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:29:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:29:44,280 INFO L87 Difference]: Start difference. First operand 497 states and 546 transitions. Second operand has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:29:44,694 INFO L93 Difference]: Finished difference Result 859 states and 959 transitions. [2021-11-02 23:29:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:29:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 496 [2021-11-02 23:29:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:29:44,697 INFO L225 Difference]: With dead ends: 859 [2021-11-02 23:29:44,698 INFO L226 Difference]: Without dead ends: 509 [2021-11-02 23:29:44,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:29:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-02 23:29:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 506. [2021-11-02 23:29:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.099009900990099) internal successors, (555), 505 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 23:29:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 555 transitions. [2021-11-02 23:29:44,714 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 555 transitions. Word has length 496 [2021-11-02 23:29:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:29:44,715 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 555 transitions. [2021-11-02 23:29:44,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 555 transitions. [2021-11-02 23:29:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-02 23:29:44,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:29:44,718 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 30, 30, 29, 29, 29, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:29:44,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-02 23:29:44,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:29:44,919 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:29:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:29:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash -420730799, now seen corresponding path program 60 times [2021-11-02 23:29:44,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:29:44,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371786467] [2021-11-02 23:29:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:29:44,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:29:44,965 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:29:44,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368893823] [2021-11-02 23:29:44,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:29:44,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:29:44,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:29:44,967 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:29:44,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-02 23:30:01,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-11-02 23:30:01,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:30:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:30:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:30:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9802 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 9546 trivial. 0 not checked. [2021-11-02 23:30:02,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:30:02,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371786467] [2021-11-02 23:30:02,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:30:02,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368893823] [2021-11-02 23:30:02,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368893823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:02,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:30:02,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 23:30:02,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551236482] [2021-11-02 23:30:02,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:30:02,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:30:02,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:30:02,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:30:02,178 INFO L87 Difference]: Start difference. First operand 506 states and 555 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:30:02,293 INFO L93 Difference]: Finished difference Result 648 states and 713 transitions. [2021-11-02 23:30:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:30:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 505 [2021-11-02 23:30:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:30:02,297 INFO L225 Difference]: With dead ends: 648 [2021-11-02 23:30:02,298 INFO L226 Difference]: Without dead ends: 509 [2021-11-02 23:30:02,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 487 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 23:30:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-02 23:30:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 508. [2021-11-02 23:30:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.0986193293885602) internal successors, (557), 507 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 23:30:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 557 transitions. [2021-11-02 23:30:02,316 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 557 transitions. Word has length 505 [2021-11-02 23:30:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:30:02,317 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 557 transitions. [2021-11-02 23:30:02,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 557 transitions. [2021-11-02 23:30:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-02 23:30:02,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:30:02,322 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 30, 30, 29, 29, 29, 17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:30:02,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-02 23:30:02,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:02,548 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:30:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:30:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 365779407, now seen corresponding path program 61 times [2021-11-02 23:30:02,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:30:02,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264854691] [2021-11-02 23:30:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:30:02,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:30:02,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:30:02,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243969215] [2021-11-02 23:30:02,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:30:02,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:02,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:30:02,602 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:30:02,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-02 23:30:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:30:06,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:30:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:30:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9835 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 8935 trivial. 0 not checked. [2021-11-02 23:30:08,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:30:08,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264854691] [2021-11-02 23:30:08,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:30:08,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243969215] [2021-11-02 23:30:08,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243969215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:08,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:30:08,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-02 23:30:08,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533351277] [2021-11-02 23:30:08,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:30:08,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:30:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:30:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:30:08,067 INFO L87 Difference]: Start difference. First operand 508 states and 557 transitions. Second operand has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:30:08,177 INFO L93 Difference]: Finished difference Result 956 states and 1054 transitions. [2021-11-02 23:30:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:30:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 507 [2021-11-02 23:30:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:30:08,179 INFO L225 Difference]: With dead ends: 956 [2021-11-02 23:30:08,179 INFO L226 Difference]: Without dead ends: 511 [2021-11-02 23:30:08,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:30:08,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-02 23:30:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 510. [2021-11-02 23:30:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.0982318271119842) internal successors, (559), 509 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 23:30:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 559 transitions. [2021-11-02 23:30:08,190 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 559 transitions. Word has length 507 [2021-11-02 23:30:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:30:08,190 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 559 transitions. [2021-11-02 23:30:08,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 559 transitions. [2021-11-02 23:30:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-11-02 23:30:08,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:30:08,193 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 31, 31, 29, 29, 29, 17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:30:08,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-02 23:30:08,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:08,402 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:30:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:30:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1745753203, now seen corresponding path program 62 times [2021-11-02 23:30:08,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:30:08,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039441948] [2021-11-02 23:30:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:30:08,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:30:08,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:30:08,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910734141] [2021-11-02 23:30:08,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:30:08,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:08,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:30:08,454 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:30:08,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-02 23:30:12,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:30:12,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:30:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:30:12,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:30:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9896 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 8935 trivial. 0 not checked. [2021-11-02 23:30:14,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:30:14,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039441948] [2021-11-02 23:30:14,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:30:14,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910734141] [2021-11-02 23:30:14,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910734141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:14,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:30:14,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-02 23:30:14,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968919021] [2021-11-02 23:30:14,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 23:30:14,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:30:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 23:30:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:30:14,128 INFO L87 Difference]: Start difference. First operand 510 states and 559 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 23:30:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:30:14,317 INFO L93 Difference]: Finished difference Result 958 states and 1056 transitions. [2021-11-02 23:30:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:30:14,318 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 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 509 [2021-11-02 23:30:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:30:14,322 INFO L225 Difference]: With dead ends: 958 [2021-11-02 23:30:14,322 INFO L226 Difference]: Without dead ends: 513 [2021-11-02 23:30:14,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:30:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-02 23:30:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 512. [2021-11-02 23:30:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.0978473581213308) internal successors, (561), 511 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 23:30:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 561 transitions. [2021-11-02 23:30:14,342 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 561 transitions. Word has length 509 [2021-11-02 23:30:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:30:14,342 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 561 transitions. [2021-11-02 23:30:14,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 23:30:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 561 transitions. [2021-11-02 23:30:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-02 23:30:14,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:30:14,348 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 32, 32, 29, 29, 29, 17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:30:14,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-02 23:30:14,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:14,568 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:30:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:30:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash 590939595, now seen corresponding path program 63 times [2021-11-02 23:30:14,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:30:14,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144405742] [2021-11-02 23:30:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:30:14,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:30:14,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:30:14,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501309944] [2021-11-02 23:30:14,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:30:14,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:14,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:30:14,636 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:30:14,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-02 23:30:27,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-02 23:30:27,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:30:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-02 23:30:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:30:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9959 backedges. 193 proven. 289 refuted. 0 times theorem prover too weak. 9477 trivial. 0 not checked. [2021-11-02 23:30:28,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:30:28,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144405742] [2021-11-02 23:30:28,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:30:28,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501309944] [2021-11-02 23:30:28,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501309944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:28,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:30:28,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 23:30:28,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782604979] [2021-11-02 23:30:28,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:30:28,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:30:28,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:30:28,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:30:28,516 INFO L87 Difference]: Start difference. First operand 512 states and 561 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:28,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:30:28,990 INFO L93 Difference]: Finished difference Result 654 states and 719 transitions. [2021-11-02 23:30:28,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:30:28,990 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2021-11-02 23:30:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:30:28,993 INFO L225 Difference]: With dead ends: 654 [2021-11-02 23:30:28,993 INFO L226 Difference]: Without dead ends: 515 [2021-11-02 23:30:28,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=624, Invalid=1268, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:30:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-02 23:30:29,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 514. [2021-11-02 23:30:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.0974658869395713) internal successors, (563), 513 states have internal predecessors, (563), 0 states have call successors, (0), 0 states 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 23:30:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 563 transitions. [2021-11-02 23:30:29,005 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 563 transitions. Word has length 511 [2021-11-02 23:30:29,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:30:29,006 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 563 transitions. [2021-11-02 23:30:29,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:29,006 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 563 transitions. [2021-11-02 23:30:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-11-02 23:30:29,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:30:29,009 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 32, 32, 29, 29, 29, 18, 18, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:30:29,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-02 23:30:29,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:29,210 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:30:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:30:29,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1918419145, now seen corresponding path program 64 times [2021-11-02 23:30:29,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:30:29,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695289426] [2021-11-02 23:30:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:30:29,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:30:29,263 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:30:29,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120841604] [2021-11-02 23:30:29,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:30:29,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:29,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:30:29,272 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:30:29,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-02 23:30:33,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:30:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:30:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 23:30:33,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:30:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9994 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8970 trivial. 0 not checked. [2021-11-02 23:30:35,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:30:35,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695289426] [2021-11-02 23:30:35,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:30:35,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120841604] [2021-11-02 23:30:35,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120841604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:35,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:30:35,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-02 23:30:35,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942144140] [2021-11-02 23:30:35,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:30:35,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:30:35,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:30:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:30:35,350 INFO L87 Difference]: Start difference. First operand 514 states and 563 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:30:35,445 INFO L93 Difference]: Finished difference Result 964 states and 1062 transitions. [2021-11-02 23:30:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:30:35,461 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 513 [2021-11-02 23:30:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:30:35,464 INFO L225 Difference]: With dead ends: 964 [2021-11-02 23:30:35,465 INFO L226 Difference]: Without dead ends: 517 [2021-11-02 23:30:35,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:30:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-02 23:30:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 516. [2021-11-02 23:30:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.0970873786407767) internal successors, (565), 515 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 23:30:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 565 transitions. [2021-11-02 23:30:35,477 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 565 transitions. Word has length 513 [2021-11-02 23:30:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:30:35,477 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 565 transitions. [2021-11-02 23:30:35,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 565 transitions. [2021-11-02 23:30:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-11-02 23:30:35,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:30:35,481 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 33, 33, 29, 29, 29, 18, 18, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:30:35,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-02 23:30:35,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:35,682 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:30:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:30:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1944882183, now seen corresponding path program 65 times [2021-11-02 23:30:35,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:30:35,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080141456] [2021-11-02 23:30:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:30:35,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:30:35,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:30:35,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051960468] [2021-11-02 23:30:35,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:30:35,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:35,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:30:35,735 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:30:35,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58d7367e-37c6-47e9-a790-06783c59baec/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process