./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY --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 de6f1b0c31f6078d1329908bc6a1fa31b1de3eefc77e75c566f65f8bba6f4e00 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:27:50,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:27:50,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:27:50,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:27:50,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:27:50,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:27:50,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:27:50,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:27:50,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:27:50,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:27:50,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:27:50,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:27:50,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:27:50,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:27:50,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:27:50,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:27:50,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:27:50,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:27:50,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:27:50,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:27:50,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:27:50,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:27:50,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:27:50,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:27:50,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:27:50,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:27:50,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:27:50,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:27:50,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:27:50,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:27:50,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:27:50,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:27:50,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:27:50,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:27:50,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:27:50,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:27:50,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:27:50,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:27:50,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:27:50,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:27:50,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:27:50,836 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:27:50,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:27:50,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:27:50,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:27:50,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:27:50,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:27:50,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:27:50,885 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:27:50,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:27:50,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:27:50,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:27:50,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:27:50,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:27:50,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:27:50,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:27:50,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:27:50,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:27:50,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:27:50,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:27:50,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:27:50,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:27:50,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:27:50,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:27:50,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:27:50,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:27:50,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:27:50,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:27:50,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:27:50,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:27:50,891 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:27:50,893 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:27:50,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:27:50,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:27:50,894 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_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de6f1b0c31f6078d1329908bc6a1fa31b1de3eefc77e75c566f65f8bba6f4e00 [2021-11-07 08:27:51,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:27:51,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:27:51,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:27:51,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:27:51,170 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:27:51,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c [2021-11-07 08:27:51,253 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/data/b013fdf3e/ffff2dde63c64fb892d1625c00010026/FLAG1a915ec7e [2021-11-07 08:27:51,665 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:27:51,665 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c [2021-11-07 08:27:51,677 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/data/b013fdf3e/ffff2dde63c64fb892d1625c00010026/FLAG1a915ec7e [2021-11-07 08:27:52,064 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/data/b013fdf3e/ffff2dde63c64fb892d1625c00010026 [2021-11-07 08:27:52,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:27:52,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:27:52,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:27:52,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:27:52,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:27:52,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27743a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52, skipping insertion in model container [2021-11-07 08:27:52,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:27:52,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:27:52,263 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_ec8b899e-431d-4384-8961-16344b19c7e3/sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2021-11-07 08:27:52,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:27:52,275 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:27:52,293 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_ec8b899e-431d-4384-8961-16344b19c7e3/sv-benchmarks/c/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2021-11-07 08:27:52,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:27:52,307 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:27:52,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52 WrapperNode [2021-11-07 08:27:52,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:27:52,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:27:52,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:27:52,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:27:52,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:27:52,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:27:52,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:27:52,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:27:52,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:27:52,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:27:52,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:27:52,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:27:52,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (1/1) ... [2021-11-07 08:27:52,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:27:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:52,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:27:52,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:27:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:27:52,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:27:52,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:27:52,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:27:52,603 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:27:52,603 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 08:27:52,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:27:52 BoogieIcfgContainer [2021-11-07 08:27:52,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:27:52,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:27:52,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:27:52,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:27:52,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:27:52" (1/3) ... [2021-11-07 08:27:52,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234ffee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:27:52, skipping insertion in model container [2021-11-07 08:27:52,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:27:52" (2/3) ... [2021-11-07 08:27:52,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234ffee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:27:52, skipping insertion in model container [2021-11-07 08:27:52,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:27:52" (3/3) ... [2021-11-07 08:27:52,613 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2021-11-07 08:27:52,619 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:27:52,619 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:27:52,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:27:52,673 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 [2021-11-07 08:27:52,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:27:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 08:27:52,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:52,692 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:52,693 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times [2021-11-07 08:27:52,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:52,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354979944] [2021-11-07 08:27:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:52,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:52,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:52,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041523611] [2021-11-07 08:27:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:52,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:52,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:52,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:27:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:52,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:27:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:53,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:53,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354979944] [2021-11-07 08:27:53,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:53,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041523611] [2021-11-07 08:27:53,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041523611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:53,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:27:53,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:27:53,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322883984] [2021-11-07 08:27:53,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:27:53,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:27:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:27:53,129 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:53,194 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-07 08:27:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:27:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-07 08:27:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:53,204 INFO L225 Difference]: With dead ends: 21 [2021-11-07 08:27:53,204 INFO L226 Difference]: Without dead ends: 9 [2021-11-07 08:27:53,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:27:53,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-07 08:27:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-07 08:27:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-07 08:27:53,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-11-07 08:27:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:53,241 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-07 08:27:53,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-07 08:27:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:27:53,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:53,242 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:53,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:53,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-07 08:27:53,457 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times [2021-11-07 08:27:53,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:53,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830934749] [2021-11-07 08:27:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:53,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:53,477 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:53,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176568341] [2021-11-07 08:27:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:53,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:53,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:53,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:27:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:53,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:27:53,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:53,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:53,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830934749] [2021-11-07 08:27:53,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:53,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176568341] [2021-11-07 08:27:53,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176568341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:53,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:53,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 08:27:53,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027317993] [2021-11-07 08:27:53,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:27:53,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:53,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:27:53,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:27:53,772 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:53,821 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-11-07 08:27:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:27:53,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 08:27:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:53,822 INFO L225 Difference]: With dead ends: 13 [2021-11-07 08:27:53,823 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 08:27:53,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:27:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 08:27:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-07 08:27:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-07 08:27:53,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-11-07 08:27:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:53,828 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-07 08:27:53,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-07 08:27:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:27:53,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:53,830 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:53,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:54,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:54,041 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:54,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1270519115, now seen corresponding path program 2 times [2021-11-07 08:27:54,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:54,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882005173] [2021-11-07 08:27:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:54,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:54,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:54,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389673246] [2021-11-07 08:27:54,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:27:54,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:54,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:54,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:54,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:27:54,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:27:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:27:54,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:54,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:54,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882005173] [2021-11-07 08:27:54,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:54,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389673246] [2021-11-07 08:27:54,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389673246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:54,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:54,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 08:27:54,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028844173] [2021-11-07 08:27:54,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:27:54,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:54,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:27:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:27:54,357 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:54,387 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-07 08:27:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:27:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 08:27:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:54,388 INFO L225 Difference]: With dead ends: 14 [2021-11-07 08:27:54,389 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 08:27:54,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:27:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 08:27:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-07 08:27:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-07 08:27:54,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-11-07 08:27:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:54,393 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-07 08:27:54,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-07 08:27:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:27:54,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:54,394 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:54,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:54,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:54,617 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash 731324427, now seen corresponding path program 3 times [2021-11-07 08:27:54,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:54,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14663998] [2021-11-07 08:27:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:54,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:54,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:54,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798730813] [2021-11-07 08:27:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:27:54,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:54,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:54,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:27:54,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:27:54,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:27:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:54,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:54,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14663998] [2021-11-07 08:27:54,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:54,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798730813] [2021-11-07 08:27:54,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798730813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:54,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:54,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:27:54,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434916074] [2021-11-07 08:27:54,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:27:54,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:27:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:27:54,916 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:54,963 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-07 08:27:54,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:27:54,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-07 08:27:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:54,965 INFO L225 Difference]: With dead ends: 15 [2021-11-07 08:27:54,967 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 08:27:54,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:27:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 08:27:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-07 08:27:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-07 08:27:54,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2021-11-07 08:27:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:54,976 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-07 08:27:54,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-07 08:27:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:27:54,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:54,978 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:55,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:55,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:55,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1196158283, now seen corresponding path program 4 times [2021-11-07 08:27:55,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:55,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160027574] [2021-11-07 08:27:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:55,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:55,212 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:55,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355676805] [2021-11-07 08:27:55,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:27:55,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:55,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:55,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:55,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:27:55,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:27:55,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 08:27:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:55,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:55,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160027574] [2021-11-07 08:27:55,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:55,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355676805] [2021-11-07 08:27:55,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355676805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:55,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:55,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:27:55,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849692987] [2021-11-07 08:27:55,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:27:55,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:27:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:27:55,524 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:55,582 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-11-07 08:27:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:27:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 08:27:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:55,584 INFO L225 Difference]: With dead ends: 16 [2021-11-07 08:27:55,584 INFO L226 Difference]: Without dead ends: 13 [2021-11-07 08:27:55,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:27:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-07 08:27:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-07 08:27:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-07 08:27:55,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-11-07 08:27:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:55,591 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-07 08:27:55,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-07 08:27:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:27:55,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:55,592 INFO L513 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:55,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:55,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:55,817 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1573861365, now seen corresponding path program 5 times [2021-11-07 08:27:55,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:55,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157087483] [2021-11-07 08:27:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:55,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:55,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:55,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644626181] [2021-11-07 08:27:55,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:27:55,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:55,834 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:55,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:27:55,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-07 08:27:55,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:27:55,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:56,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:56,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157087483] [2021-11-07 08:27:56,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:56,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644626181] [2021-11-07 08:27:56,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644626181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:56,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:56,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:27:56,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145291741] [2021-11-07 08:27:56,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:27:56,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:56,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:27:56,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:27:56,091 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:56,160 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-11-07 08:27:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:27:56,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:27:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:56,163 INFO L225 Difference]: With dead ends: 17 [2021-11-07 08:27:56,163 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 08:27:56,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:27:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 08:27:56,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 08:27:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-07 08:27:56,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-11-07 08:27:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:56,171 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-07 08:27:56,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-07 08:27:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:27:56,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:56,172 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:56,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:56,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:27:56,372 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:56,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1545124533, now seen corresponding path program 6 times [2021-11-07 08:27:56,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:56,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602048488] [2021-11-07 08:27:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:56,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:56,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:56,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328638817] [2021-11-07 08:27:56,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:27:56,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:56,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:56,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:27:56,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-07 08:27:56,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:56,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 08:27:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:56,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:56,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602048488] [2021-11-07 08:27:56,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:56,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328638817] [2021-11-07 08:27:56,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328638817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:56,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:56,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-07 08:27:56,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274409698] [2021-11-07 08:27:56,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:27:56,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:27:56,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:27:56,666 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:56,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:56,733 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-07 08:27:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:27:56,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 08:27:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:56,739 INFO L225 Difference]: With dead ends: 18 [2021-11-07 08:27:56,740 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 08:27:56,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:27:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 08:27:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 08:27:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-07 08:27:56,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-11-07 08:27:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:56,746 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-07 08:27:56,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-07 08:27:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:27:56,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:56,747 INFO L513 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:56,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:56,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:56,957 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -654282741, now seen corresponding path program 7 times [2021-11-07 08:27:56,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:56,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14458554] [2021-11-07 08:27:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:56,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:56,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:56,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122607148] [2021-11-07 08:27:56,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:27:56,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:56,983 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:57,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:27:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:57,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 08:27:57,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:57,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:57,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14458554] [2021-11-07 08:27:57,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:57,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122607148] [2021-11-07 08:27:57,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122607148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:57,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:57,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 08:27:57,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328663884] [2021-11-07 08:27:57,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:27:57,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:27:57,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:27:57,322 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:57,397 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-11-07 08:27:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:27:57,398 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 08:27:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:57,400 INFO L225 Difference]: With dead ends: 19 [2021-11-07 08:27:57,400 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 08:27:57,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:27:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 08:27:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 08:27:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-07 08:27:57,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-11-07 08:27:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:57,408 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-07 08:27:57,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-07 08:27:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:27:57,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:57,409 INFO L513 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:57,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:57,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:57,625 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1192009035, now seen corresponding path program 8 times [2021-11-07 08:27:57,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:57,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510756918] [2021-11-07 08:27:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:57,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:57,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:57,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999102552] [2021-11-07 08:27:57,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:27:57,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:57,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:57,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:57,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:27:57,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:27:57,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 08:27:57,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:57,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:57,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510756918] [2021-11-07 08:27:57,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:57,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999102552] [2021-11-07 08:27:57,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999102552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:57,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:57,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-07 08:27:57,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873639556] [2021-11-07 08:27:57,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:27:57,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:27:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:27:57,981 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:58,068 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-11-07 08:27:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:27:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 08:27:58,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:58,070 INFO L225 Difference]: With dead ends: 20 [2021-11-07 08:27:58,070 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 08:27:58,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:27:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 08:27:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-07 08:27:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 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) [2021-11-07 08:27:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-07 08:27:58,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-11-07 08:27:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:58,082 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-07 08:27:58,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-07 08:27:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:27:58,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:58,086 INFO L513 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:58,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:58,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:58,309 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1702488053, now seen corresponding path program 9 times [2021-11-07 08:27:58,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:58,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858067658] [2021-11-07 08:27:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:58,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:58,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:58,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988549602] [2021-11-07 08:27:58,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:27:58,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:58,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:58,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:27:58,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 08:27:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:58,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 08:27:58,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:58,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:58,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858067658] [2021-11-07 08:27:58,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:58,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988549602] [2021-11-07 08:27:58,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988549602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:58,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:58,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-07 08:27:58,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183917684] [2021-11-07 08:27:58,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:27:58,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:58,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:27:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:27:58,756 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:58,868 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-11-07 08:27:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:27:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 08:27:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:58,869 INFO L225 Difference]: With dead ends: 21 [2021-11-07 08:27:58,869 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 08:27:58,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:27:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 08:27:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-07 08:27:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-11-07 08:27:58,872 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-11-07 08:27:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:58,873 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-11-07 08:27:58,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-11-07 08:27:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:27:58,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:58,874 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:58,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:27:59,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:27:59,074 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1237584565, now seen corresponding path program 10 times [2021-11-07 08:27:59,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:59,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586917570] [2021-11-07 08:27:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:59,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:59,089 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:27:59,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706977112] [2021-11-07 08:27:59,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:27:59,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:27:59,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:27:59,091 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:27:59,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:27:59,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:27:59,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:27:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 08:27:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:27:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:27:59,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:59,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586917570] [2021-11-07 08:27:59,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:27:59,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706977112] [2021-11-07 08:27:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706977112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:27:59,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:27:59,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-07 08:27:59,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191311721] [2021-11-07 08:27:59,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:27:59,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:27:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:27:59,630 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-11-07 08:27:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:59,811 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-11-07 08:27:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:27:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 [2021-11-07 08:27:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:59,812 INFO L225 Difference]: With dead ends: 22 [2021-11-07 08:27:59,813 INFO L226 Difference]: Without dead ends: 19 [2021-11-07 08:27:59,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:27:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-07 08:27:59,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-07 08:27:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 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) [2021-11-07 08:27:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-07 08:27:59,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-11-07 08:27:59,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:59,816 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-07 08:27:59,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-11-07 08:27:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-07 08:27:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:27:59,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:59,816 INFO L513 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:27:59,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:00,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:28:00,017 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash 289521675, now seen corresponding path program 11 times [2021-11-07 08:28:00,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:00,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263969015] [2021-11-07 08:28:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:00,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:00,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:00,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920380651] [2021-11-07 08:28:00,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:28:00,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:00,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:00,050 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:00,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:28:00,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 08:28:00,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:00,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 08:28:00,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:00,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:00,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263969015] [2021-11-07 08:28:00,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:00,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920380651] [2021-11-07 08:28:00,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920380651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:00,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:00,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-07 08:28:00,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445985132] [2021-11-07 08:28:00,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:28:00,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:28:00,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:28:00,478 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:00,603 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-11-07 08:28:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:28:00,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 08:28:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:00,604 INFO L225 Difference]: With dead ends: 23 [2021-11-07 08:28:00,604 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:28:00,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:28:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:28:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 08:28:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-11-07 08:28:00,609 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-11-07 08:28:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:00,609 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-11-07 08:28:00,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-11-07 08:28:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 08:28:00,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:00,611 INFO L513 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:00,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:00,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:00,825 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:00,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:00,825 INFO L85 PathProgramCache]: Analyzing trace with hash 385174859, now seen corresponding path program 12 times [2021-11-07 08:28:00,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:00,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426551292] [2021-11-07 08:28:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:00,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:00,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:00,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635597569] [2021-11-07 08:28:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:28:00,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:00,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:00,843 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:00,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:28:01,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 08:28:01,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:01,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 08:28:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:01,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:01,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426551292] [2021-11-07 08:28:01,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:01,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635597569] [2021-11-07 08:28:01,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635597569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:01,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:01,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-07 08:28:01,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859924663] [2021-11-07 08:28:01,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:28:01,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:01,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:28:01,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:28:01,379 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2021-11-07 08:28:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:01,531 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-07 08:28:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:28:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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 [2021-11-07 08:28:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:01,533 INFO L225 Difference]: With dead ends: 24 [2021-11-07 08:28:01,533 INFO L226 Difference]: Without dead ends: 21 [2021-11-07 08:28:01,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:28:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-07 08:28:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-07 08:28:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-11-07 08:28:01,537 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-11-07 08:28:01,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:01,537 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-11-07 08:28:01,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2021-11-07 08:28:01,538 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-11-07 08:28:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:28:01,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:01,538 INFO L513 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:01,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:01,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:28:01,749 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash -944543733, now seen corresponding path program 13 times [2021-11-07 08:28:01,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:01,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156617395] [2021-11-07 08:28:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:01,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:01,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:01,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490103468] [2021-11-07 08:28:01,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:28:01,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:01,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:01,765 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:01,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:28:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:01,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 08:28:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:02,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:02,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156617395] [2021-11-07 08:28:02,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:02,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490103468] [2021-11-07 08:28:02,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490103468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:02,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:02,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-07 08:28:02,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989055116] [2021-11-07 08:28:02,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:28:02,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:28:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:28:02,248 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:02,397 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-11-07 08:28:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:28:02,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 08:28:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:02,398 INFO L225 Difference]: With dead ends: 25 [2021-11-07 08:28:02,398 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 08:28:02,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:28:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 08:28:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-07 08:28:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-11-07 08:28:02,403 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-11-07 08:28:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:02,403 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-11-07 08:28:02,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-11-07 08:28:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 08:28:02,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:02,404 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:02,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:02,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:28:02,616 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash 783852875, now seen corresponding path program 14 times [2021-11-07 08:28:02,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:02,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681826443] [2021-11-07 08:28:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:02,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:02,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:02,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561076398] [2021-11-07 08:28:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:28:02,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:02,630 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:02,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:28:02,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:28:02,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:02,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 08:28:02,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:03,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:03,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681826443] [2021-11-07 08:28:03,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:03,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561076398] [2021-11-07 08:28:03,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561076398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:03,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:03,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-07 08:28:03,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205167238] [2021-11-07 08:28:03,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:28:03,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:28:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:28:03,161 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:03,349 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-07 08:28:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:28:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-11-07 08:28:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:03,350 INFO L225 Difference]: With dead ends: 26 [2021-11-07 08:28:03,350 INFO L226 Difference]: Without dead ends: 23 [2021-11-07 08:28:03,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:28:03,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-07 08:28:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-07 08:28:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-07 08:28:03,355 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-11-07 08:28:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:03,355 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-07 08:28:03,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-07 08:28:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:28:03,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:03,356 INFO L513 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:03,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:03,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:28:03,581 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:03,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1470427125, now seen corresponding path program 15 times [2021-11-07 08:28:03,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:03,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553920579] [2021-11-07 08:28:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:03,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:03,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:03,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896923708] [2021-11-07 08:28:03,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:28:03,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:03,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:03,600 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:03,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:28:03,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 08:28:03,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:03,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 08:28:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:04,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:04,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553920579] [2021-11-07 08:28:04,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:04,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896923708] [2021-11-07 08:28:04,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896923708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:04,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:04,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 08:28:04,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623971584] [2021-11-07 08:28:04,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:28:04,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:04,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:28:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:28:04,159 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:04,360 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-11-07 08:28:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:28:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 08:28:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:04,363 INFO L225 Difference]: With dead ends: 27 [2021-11-07 08:28:04,363 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 08:28:04,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:28:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 08:28:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 08:28:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-11-07 08:28:04,372 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-11-07 08:28:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:04,372 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-11-07 08:28:04,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-11-07 08:28:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 08:28:04,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:04,373 INFO L513 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:04,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:04,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:28:04,574 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:04,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1661336907, now seen corresponding path program 16 times [2021-11-07 08:28:04,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:04,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202123489] [2021-11-07 08:28:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:04,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:04,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:04,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688550849] [2021-11-07 08:28:04,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:28:04,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:04,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:04,588 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:04,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:28:04,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:28:04,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:04,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 08:28:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:05,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:05,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202123489] [2021-11-07 08:28:05,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:05,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688550849] [2021-11-07 08:28:05,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688550849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:05,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:05,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 08:28:05,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692187719] [2021-11-07 08:28:05,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:28:05,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:28:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:28:05,207 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 20 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:05,415 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-11-07 08:28:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:28:05,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 08:28:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:05,416 INFO L225 Difference]: With dead ends: 28 [2021-11-07 08:28:05,416 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 08:28:05,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:28:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 08:28:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-07 08:28:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-11-07 08:28:05,420 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-11-07 08:28:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:05,421 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-11-07 08:28:05,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-11-07 08:28:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:28:05,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:05,422 INFO L513 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:05,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:05,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:28:05,633 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash -38225909, now seen corresponding path program 17 times [2021-11-07 08:28:05,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:05,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12795645] [2021-11-07 08:28:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:05,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:05,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:05,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135050572] [2021-11-07 08:28:05,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:28:05,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:05,648 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:05,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:28:05,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-07 08:28:05,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:05,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 08:28:05,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:06,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:06,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12795645] [2021-11-07 08:28:06,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:06,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135050572] [2021-11-07 08:28:06,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135050572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:06,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:06,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-07 08:28:06,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854611653] [2021-11-07 08:28:06,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:28:06,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:28:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:28:06,334 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:06,534 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-11-07 08:28:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:28:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 08:28:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:06,535 INFO L225 Difference]: With dead ends: 29 [2021-11-07 08:28:06,536 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 08:28:06,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:28:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 08:28:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-07 08:28:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-11-07 08:28:06,539 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-11-07 08:28:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:06,540 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-11-07 08:28:06,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-11-07 08:28:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:28:06,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:06,540 INFO L513 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:06,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:06,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:28:06,745 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:06,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1185065653, now seen corresponding path program 18 times [2021-11-07 08:28:06,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:06,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381543639] [2021-11-07 08:28:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:06,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:06,757 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:06,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947818182] [2021-11-07 08:28:06,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:28:06,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:06,778 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:06,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:28:07,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-07 08:28:07,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:07,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-07 08:28:07,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:07,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:07,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381543639] [2021-11-07 08:28:07,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:07,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947818182] [2021-11-07 08:28:07,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947818182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:07,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:07,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-07 08:28:07,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363631713] [2021-11-07 08:28:07,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:28:07,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:28:07,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:28:07,431 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:07,633 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-07 08:28:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:28:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 08:28:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:07,634 INFO L225 Difference]: With dead ends: 30 [2021-11-07 08:28:07,634 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 08:28:07,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:28:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 08:28:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 08:28:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-07 08:28:07,639 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-11-07 08:28:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:07,640 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-07 08:28:07,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-07 08:28:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:28:07,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:07,641 INFO L513 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:07,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:07,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:07,858 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1917607947, now seen corresponding path program 19 times [2021-11-07 08:28:07,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:07,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091160912] [2021-11-07 08:28:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:07,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:07,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:07,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459933265] [2021-11-07 08:28:07,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:28:07,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:07,876 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:07,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:28:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:08,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 08:28:08,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:08,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:08,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091160912] [2021-11-07 08:28:08,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:08,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459933265] [2021-11-07 08:28:08,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459933265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:08,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:08,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-07 08:28:08,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481627821] [2021-11-07 08:28:08,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:28:08,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:28:08,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:28:08,570 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:08,838 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-11-07 08:28:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:28:08,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 08:28:08,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:08,839 INFO L225 Difference]: With dead ends: 31 [2021-11-07 08:28:08,839 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 08:28:08,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:28:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 08:28:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-07 08:28:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 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) [2021-11-07 08:28:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-07 08:28:08,844 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-11-07 08:28:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:08,845 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-07 08:28:08,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:08,845 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-07 08:28:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:28:08,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:08,846 INFO L513 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:08,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:09,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:09,061 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -683758261, now seen corresponding path program 20 times [2021-11-07 08:28:09,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:09,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697638761] [2021-11-07 08:28:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:09,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:09,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:09,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486725796] [2021-11-07 08:28:09,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:28:09,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:09,075 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:09,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:28:09,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:28:09,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:09,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-07 08:28:09,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:09,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:09,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697638761] [2021-11-07 08:28:09,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:09,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486725796] [2021-11-07 08:28:09,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486725796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:09,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:09,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 08:28:09,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793107226] [2021-11-07 08:28:09,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:28:09,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:28:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:28:09,850 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:10,158 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-11-07 08:28:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:28:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 08:28:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:10,160 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:28:10,160 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 08:28:10,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:28:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 08:28:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-07 08:28:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:10,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-11-07 08:28:10,171 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-11-07 08:28:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:10,172 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-11-07 08:28:10,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-11-07 08:28:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:28:10,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:10,172 INFO L513 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:10,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:10,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 08:28:10,373 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:10,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash 278267915, now seen corresponding path program 21 times [2021-11-07 08:28:10,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:10,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434223127] [2021-11-07 08:28:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:10,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:10,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:10,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177525387] [2021-11-07 08:28:10,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:28:10,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:10,393 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:10,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:28:10,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-07 08:28:10,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:10,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-07 08:28:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:11,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:11,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434223127] [2021-11-07 08:28:11,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:11,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177525387] [2021-11-07 08:28:11,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177525387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:11,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:11,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-07 08:28:11,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549813052] [2021-11-07 08:28:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:28:11,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:28:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:28:11,196 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2021-11-07 08:28:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:11,499 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-11-07 08:28:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:28:11,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 25 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 [2021-11-07 08:28:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:11,511 INFO L225 Difference]: With dead ends: 33 [2021-11-07 08:28:11,512 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 08:28:11,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:28:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 08:28:11,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-07 08:28:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 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) [2021-11-07 08:28:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-11-07 08:28:11,517 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-11-07 08:28:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:11,517 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-11-07 08:28:11,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2021-11-07 08:28:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-11-07 08:28:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:28:11,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:11,519 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:11,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-07 08:28:11,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:11,743 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash 36308299, now seen corresponding path program 22 times [2021-11-07 08:28:11,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:11,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300437366] [2021-11-07 08:28:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:11,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:11,760 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:11,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829538558] [2021-11-07 08:28:11,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:28:11,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:11,761 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:11,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:28:12,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:28:12,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:12,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 08:28:12,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:12,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:12,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300437366] [2021-11-07 08:28:12,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:12,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829538558] [2021-11-07 08:28:12,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829538558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:12,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:12,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-07 08:28:12,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828467467] [2021-11-07 08:28:12,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:28:12,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:28:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:28:12,665 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:12,952 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-11-07 08:28:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:28:12,961 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:28:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:12,962 INFO L225 Difference]: With dead ends: 34 [2021-11-07 08:28:12,962 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 08:28:12,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:28:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 08:28:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-07 08:28:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-07 08:28:12,968 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-11-07 08:28:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:12,968 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-07 08:28:12,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-07 08:28:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:28:12,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:12,969 INFO L513 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:13,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:13,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:28:13,185 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1125494795, now seen corresponding path program 23 times [2021-11-07 08:28:13,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:13,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539491746] [2021-11-07 08:28:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:13,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:13,196 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:13,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535146884] [2021-11-07 08:28:13,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:28:13,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:13,198 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:13,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:28:13,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-07 08:28:13,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:13,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-07 08:28:13,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:14,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:14,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539491746] [2021-11-07 08:28:14,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:14,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535146884] [2021-11-07 08:28:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535146884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:14,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-07 08:28:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009328950] [2021-11-07 08:28:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:28:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:28:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:28:14,058 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2021-11-07 08:28:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:14,405 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-11-07 08:28:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:28:14,405 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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 [2021-11-07 08:28:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:14,406 INFO L225 Difference]: With dead ends: 35 [2021-11-07 08:28:14,406 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:28:14,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:28:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:28:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-07 08:28:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-11-07 08:28:14,410 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-11-07 08:28:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:14,410 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-11-07 08:28:14,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2021-11-07 08:28:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-11-07 08:28:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:28:14,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:14,411 INFO L513 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:14,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:14,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:28:14,611 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash 530537803, now seen corresponding path program 24 times [2021-11-07 08:28:14,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:14,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438370514] [2021-11-07 08:28:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:14,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:14,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:14,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267911583] [2021-11-07 08:28:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:28:14,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:14,621 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:14,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:28:14,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 08:28:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:14,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-07 08:28:14,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:15,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:15,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438370514] [2021-11-07 08:28:15,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:15,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267911583] [2021-11-07 08:28:15,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267911583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:15,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:15,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-07 08:28:15,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001002046] [2021-11-07 08:28:15,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:28:15,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:28:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:28:15,517 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:15,859 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-11-07 08:28:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 08:28:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 08:28:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:15,860 INFO L225 Difference]: With dead ends: 36 [2021-11-07 08:28:15,860 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 08:28:15,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:28:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 08:28:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-07 08:28:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 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) [2021-11-07 08:28:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-11-07 08:28:15,866 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-11-07 08:28:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:15,866 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-11-07 08:28:15,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-11-07 08:28:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:28:15,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:15,867 INFO L513 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:15,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:16,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:16,097 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash -733259765, now seen corresponding path program 25 times [2021-11-07 08:28:16,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:16,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752638592] [2021-11-07 08:28:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:16,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:16,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:16,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431605088] [2021-11-07 08:28:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:28:16,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:16,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:16,127 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:16,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:28:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:16,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 08:28:16,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:17,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:17,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752638592] [2021-11-07 08:28:17,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:17,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431605088] [2021-11-07 08:28:17,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431605088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:17,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:17,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-07 08:28:17,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578601127] [2021-11-07 08:28:17,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:28:17,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:17,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:28:17,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:28:17,159 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:17,559 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-11-07 08:28:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:28:17,559 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 08:28:17,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:17,560 INFO L225 Difference]: With dead ends: 37 [2021-11-07 08:28:17,560 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 08:28:17,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:28:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 08:28:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-07 08:28:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 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) [2021-11-07 08:28:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-11-07 08:28:17,566 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-11-07 08:28:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:17,566 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-11-07 08:28:17,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-11-07 08:28:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:28:17,567 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:17,567 INFO L513 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:17,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:17,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:17,773 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1256278709, now seen corresponding path program 26 times [2021-11-07 08:28:17,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:17,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176648707] [2021-11-07 08:28:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:17,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:17,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:17,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089241563] [2021-11-07 08:28:17,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:28:17,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:17,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:17,786 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:17,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:28:18,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:28:18,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:18,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-07 08:28:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:18,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:18,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176648707] [2021-11-07 08:28:18,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:18,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089241563] [2021-11-07 08:28:18,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089241563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:18,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:18,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-07 08:28:18,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473402114] [2021-11-07 08:28:18,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 08:28:18,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 08:28:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:28:18,817 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 30 states, 30 states have (on average 1.1) internal successors, (33), 30 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) [2021-11-07 08:28:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:19,226 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-11-07 08:28:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:28:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 30 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 33 [2021-11-07 08:28:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:19,226 INFO L225 Difference]: With dead ends: 38 [2021-11-07 08:28:19,227 INFO L226 Difference]: Without dead ends: 35 [2021-11-07 08:28:19,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:28:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-07 08:28:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-07 08:28:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 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) [2021-11-07 08:28:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-07 08:28:19,231 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-11-07 08:28:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:19,232 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-07 08:28:19,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 30 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) [2021-11-07 08:28:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-07 08:28:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:28:19,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:19,233 INFO L513 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:19,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 08:28:19,441 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash -289996789, now seen corresponding path program 27 times [2021-11-07 08:28:19,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:19,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801575144] [2021-11-07 08:28:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:19,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:19,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:19,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383315428] [2021-11-07 08:28:19,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:28:19,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:19,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:19,455 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:19,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:28:19,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 08:28:19,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:19,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-07 08:28:19,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:20,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:20,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801575144] [2021-11-07 08:28:20,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:20,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383315428] [2021-11-07 08:28:20,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383315428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:20,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:20,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-07 08:28:20,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228315580] [2021-11-07 08:28:20,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:28:20,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:20,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:28:20,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:28:20,491 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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) [2021-11-07 08:28:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:20,900 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-11-07 08:28:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:28:20,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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 34 [2021-11-07 08:28:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:20,905 INFO L225 Difference]: With dead ends: 39 [2021-11-07 08:28:20,905 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 08:28:20,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:28:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 08:28:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 08:28:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-11-07 08:28:20,918 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-11-07 08:28:20,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:20,920 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-11-07 08:28:20,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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) [2021-11-07 08:28:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-11-07 08:28:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 08:28:20,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:20,921 INFO L513 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:20,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-07 08:28:21,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:28:21,133 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash -400028341, now seen corresponding path program 28 times [2021-11-07 08:28:21,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:21,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34581368] [2021-11-07 08:28:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:21,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:21,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:21,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031811828] [2021-11-07 08:28:21,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:28:21,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:21,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:21,156 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:21,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:28:21,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:28:21,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:21,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-07 08:28:21,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:22,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:22,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34581368] [2021-11-07 08:28:22,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:22,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031811828] [2021-11-07 08:28:22,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031811828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:22,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:22,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-07 08:28:22,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400529781] [2021-11-07 08:28:22,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 08:28:22,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 08:28:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:28:22,249 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 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) [2021-11-07 08:28:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:22,678 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-11-07 08:28:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:28:22,678 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 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 35 [2021-11-07 08:28:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:22,679 INFO L225 Difference]: With dead ends: 40 [2021-11-07 08:28:22,679 INFO L226 Difference]: Without dead ends: 37 [2021-11-07 08:28:22,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:28:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-07 08:28:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-07 08:28:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 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) [2021-11-07 08:28:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-11-07 08:28:22,684 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-11-07 08:28:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:22,685 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-11-07 08:28:22,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 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) [2021-11-07 08:28:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-11-07 08:28:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:28:22,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:22,686 INFO L513 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:22,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:22,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:28:22,893 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash 483960843, now seen corresponding path program 29 times [2021-11-07 08:28:22,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:22,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828409716] [2021-11-07 08:28:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:22,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:22,904 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:22,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598367180] [2021-11-07 08:28:22,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:28:22,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:22,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:22,906 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:22,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:28:23,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-07 08:28:23,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:23,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-07 08:28:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:24,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:24,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828409716] [2021-11-07 08:28:24,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:24,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598367180] [2021-11-07 08:28:24,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598367180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:24,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:24,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-07 08:28:24,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023092289] [2021-11-07 08:28:24,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 08:28:24,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 08:28:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:28:24,047 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:24,526 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-11-07 08:28:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:28:24,527 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 08:28:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:24,527 INFO L225 Difference]: With dead ends: 41 [2021-11-07 08:28:24,527 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 08:28:24,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:28:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 08:28:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-07 08:28:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 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) [2021-11-07 08:28:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-11-07 08:28:24,532 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-11-07 08:28:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:24,532 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-11-07 08:28:24,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-11-07 08:28:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:28:24,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:24,534 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:24,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-07 08:28:24,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:24,761 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2117821771, now seen corresponding path program 30 times [2021-11-07 08:28:24,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:24,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477013149] [2021-11-07 08:28:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:24,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:24,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:24,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140625258] [2021-11-07 08:28:24,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:28:24,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:24,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:24,776 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:24,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:28:25,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-07 08:28:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:25,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-07 08:28:25,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:25,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:25,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477013149] [2021-11-07 08:28:25,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:25,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140625258] [2021-11-07 08:28:25,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140625258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:25,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:25,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-07 08:28:25,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417621659] [2021-11-07 08:28:25,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:28:25,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:25,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:28:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:28:25,984 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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) [2021-11-07 08:28:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:26,503 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-11-07 08:28:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:28:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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 37 [2021-11-07 08:28:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:26,504 INFO L225 Difference]: With dead ends: 42 [2021-11-07 08:28:26,504 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 08:28:26,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:28:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 08:28:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-07 08:28:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 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) [2021-11-07 08:28:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-11-07 08:28:26,516 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-11-07 08:28:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:26,516 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-11-07 08:28:26,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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) [2021-11-07 08:28:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-11-07 08:28:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:28:26,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:26,517 INFO L513 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:26,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:26,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-07 08:28:26,741 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1227902987, now seen corresponding path program 31 times [2021-11-07 08:28:26,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:26,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189936830] [2021-11-07 08:28:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:26,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:26,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:26,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98371908] [2021-11-07 08:28:26,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:28:26,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:26,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:26,756 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:28:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:27,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-07 08:28:27,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:28,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:28,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189936830] [2021-11-07 08:28:28,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:28,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98371908] [2021-11-07 08:28:28,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98371908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:28,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:28,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-07 08:28:28,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026064722] [2021-11-07 08:28:28,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:28:28,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:28:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:28:28,177 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2021-11-07 08:28:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:28,774 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-11-07 08:28:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:28:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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 38 [2021-11-07 08:28:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:28,775 INFO L225 Difference]: With dead ends: 43 [2021-11-07 08:28:28,775 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 08:28:28,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:28:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 08:28:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-07 08:28:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 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) [2021-11-07 08:28:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-11-07 08:28:28,780 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-11-07 08:28:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:28,780 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-11-07 08:28:28,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2021-11-07 08:28:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-11-07 08:28:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:28:28,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:28,781 INFO L513 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:28,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 08:28:28,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:28,989 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash -589775541, now seen corresponding path program 32 times [2021-11-07 08:28:28,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:28,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832440890] [2021-11-07 08:28:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:28,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:29,001 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:29,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887735356] [2021-11-07 08:28:29,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:28:29,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:29,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:29,017 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:29,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:28:29,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:28:29,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:29,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-07 08:28:29,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:30,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:30,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832440890] [2021-11-07 08:28:30,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:30,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887735356] [2021-11-07 08:28:30,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887735356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:30,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:30,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-07 08:28:30,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517140756] [2021-11-07 08:28:30,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 08:28:30,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:30,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 08:28:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:28:30,320 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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) [2021-11-07 08:28:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:30,933 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-11-07 08:28:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:28:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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 39 [2021-11-07 08:28:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:30,934 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:28:30,934 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 08:28:30,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:28:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 08:28:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-07 08:28:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 40 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) [2021-11-07 08:28:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-11-07 08:28:30,941 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-11-07 08:28:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:30,941 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-11-07 08:28:30,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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) [2021-11-07 08:28:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-11-07 08:28:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:28:30,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:30,942 INFO L513 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:30,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:31,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:28:31,157 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:31,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1103235061, now seen corresponding path program 33 times [2021-11-07 08:28:31,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:31,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254818695] [2021-11-07 08:28:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:31,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:31,169 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:31,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306713339] [2021-11-07 08:28:31,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:28:31,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:31,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:31,171 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:31,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:28:31,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 08:28:31,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:31,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-07 08:28:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:32,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:32,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254818695] [2021-11-07 08:28:32,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:32,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306713339] [2021-11-07 08:28:32,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306713339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:32,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:32,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-07 08:28:32,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498279722] [2021-11-07 08:28:32,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 08:28:32,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 08:28:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:28:32,721 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 38 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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) [2021-11-07 08:28:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:33,436 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-11-07 08:28:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 08:28:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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 40 [2021-11-07 08:28:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:33,436 INFO L225 Difference]: With dead ends: 45 [2021-11-07 08:28:33,436 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 08:28:33,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:28:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 08:28:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-07 08:28:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 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) [2021-11-07 08:28:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-11-07 08:28:33,440 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-11-07 08:28:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:33,440 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-11-07 08:28:33,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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) [2021-11-07 08:28:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-11-07 08:28:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:28:33,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:33,441 INFO L513 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:33,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-07 08:28:33,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:33,642 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash 159389003, now seen corresponding path program 34 times [2021-11-07 08:28:33,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:33,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198319429] [2021-11-07 08:28:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:33,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:33,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:33,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720500049] [2021-11-07 08:28:33,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:28:33,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:33,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:33,655 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:33,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:28:34,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:28:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:34,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-07 08:28:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:35,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:35,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198319429] [2021-11-07 08:28:35,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:35,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720500049] [2021-11-07 08:28:35,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720500049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:35,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:35,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-07 08:28:35,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219797912] [2021-11-07 08:28:35,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 08:28:35,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:35,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 08:28:35,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:28:35,099 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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) [2021-11-07 08:28:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:35,838 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-11-07 08:28:35,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 08:28:35,839 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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 41 [2021-11-07 08:28:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:35,839 INFO L225 Difference]: With dead ends: 46 [2021-11-07 08:28:35,839 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 08:28:35,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:28:35,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 08:28:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-07 08:28:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 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) [2021-11-07 08:28:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-11-07 08:28:35,844 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-11-07 08:28:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:35,844 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-11-07 08:28:35,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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) [2021-11-07 08:28:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-11-07 08:28:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:28:35,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:35,845 INFO L513 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:35,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-07 08:28:36,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 08:28:36,048 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 646029323, now seen corresponding path program 35 times [2021-11-07 08:28:36,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:36,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601839896] [2021-11-07 08:28:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:36,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:36,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:36,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429980843] [2021-11-07 08:28:36,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:28:36,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:36,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:36,105 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:36,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:28:36,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-07 08:28:36,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:36,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-07 08:28:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:37,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:37,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601839896] [2021-11-07 08:28:37,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:37,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429980843] [2021-11-07 08:28:37,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429980843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:37,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:37,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-07 08:28:37,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315105983] [2021-11-07 08:28:37,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:28:37,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:37,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:28:37,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:28:37,704 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2021-11-07 08:28:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:38,474 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-11-07 08:28:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:28:38,475 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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 42 [2021-11-07 08:28:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:38,475 INFO L225 Difference]: With dead ends: 47 [2021-11-07 08:28:38,475 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:28:38,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:28:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:28:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-07 08:28:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 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) [2021-11-07 08:28:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-11-07 08:28:38,479 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-11-07 08:28:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:38,480 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-11-07 08:28:38,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2021-11-07 08:28:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-11-07 08:28:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 08:28:38,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:38,480 INFO L513 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:38,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:38,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 08:28:38,681 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:38,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1447989941, now seen corresponding path program 36 times [2021-11-07 08:28:38,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:38,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742021656] [2021-11-07 08:28:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:38,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:38,698 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:38,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592206100] [2021-11-07 08:28:38,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:28:38,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:38,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:38,700 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:38,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:28:39,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 08:28:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:39,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 152 conjunts are in the unsatisfiable core [2021-11-07 08:28:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:40,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:40,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742021656] [2021-11-07 08:28:40,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:40,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592206100] [2021-11-07 08:28:40,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592206100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:40,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:40,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-11-07 08:28:40,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130604945] [2021-11-07 08:28:40,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 08:28:40,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:40,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 08:28:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:28:40,377 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 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) [2021-11-07 08:28:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:41,196 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-11-07 08:28:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:28:41,196 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 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 43 [2021-11-07 08:28:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:41,197 INFO L225 Difference]: With dead ends: 48 [2021-11-07 08:28:41,197 INFO L226 Difference]: Without dead ends: 45 [2021-11-07 08:28:41,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:28:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-07 08:28:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-07 08:28:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 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) [2021-11-07 08:28:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-11-07 08:28:41,203 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-11-07 08:28:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:41,206 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-11-07 08:28:41,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 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) [2021-11-07 08:28:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-11-07 08:28:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:28:41,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:41,207 INFO L513 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:41,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:41,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 08:28:41,433 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:41,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:41,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1938077685, now seen corresponding path program 37 times [2021-11-07 08:28:41,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:41,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301764229] [2021-11-07 08:28:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:41,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:41,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:41,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373766755] [2021-11-07 08:28:41,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:28:41,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:41,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:41,458 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:41,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 08:28:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:28:42,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-07 08:28:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:43,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:43,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301764229] [2021-11-07 08:28:43,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:43,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373766755] [2021-11-07 08:28:43,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373766755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:43,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:43,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-11-07 08:28:43,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862956194] [2021-11-07 08:28:43,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 08:28:43,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 08:28:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:28:43,118 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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) [2021-11-07 08:28:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:44,117 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-11-07 08:28:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 08:28:44,118 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:28:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:44,118 INFO L225 Difference]: With dead ends: 49 [2021-11-07 08:28:44,118 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 08:28:44,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:28:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 08:28:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-07 08:28:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 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) [2021-11-07 08:28:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-11-07 08:28:44,125 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-11-07 08:28:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:44,125 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-11-07 08:28:44,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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) [2021-11-07 08:28:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-11-07 08:28:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:28:44,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:44,127 INFO L513 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:44,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:44,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:28:44,349 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash 49071435, now seen corresponding path program 38 times [2021-11-07 08:28:44,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:44,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289998661] [2021-11-07 08:28:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:44,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:44,361 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:44,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986210585] [2021-11-07 08:28:44,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:28:44,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:44,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:44,365 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:44,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 08:28:44,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:28:44,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:44,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 160 conjunts are in the unsatisfiable core [2021-11-07 08:28:44,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:46,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:46,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289998661] [2021-11-07 08:28:46,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:46,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986210585] [2021-11-07 08:28:46,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986210585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:46,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:46,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-11-07 08:28:46,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692862631] [2021-11-07 08:28:46,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 08:28:46,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:46,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 08:28:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:28:46,039 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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) [2021-11-07 08:28:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:46,962 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-11-07 08:28:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:28:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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 45 [2021-11-07 08:28:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:46,963 INFO L225 Difference]: With dead ends: 50 [2021-11-07 08:28:46,963 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 08:28:46,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:28:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 08:28:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-07 08:28:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 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) [2021-11-07 08:28:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-11-07 08:28:46,967 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-11-07 08:28:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:46,968 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-11-07 08:28:46,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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) [2021-11-07 08:28:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-11-07 08:28:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:28:46,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:46,968 INFO L513 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:46,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:28:47,169 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1521152011, now seen corresponding path program 39 times [2021-11-07 08:28:47,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:47,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401375709] [2021-11-07 08:28:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:47,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:47,181 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:47,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075898547] [2021-11-07 08:28:47,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:28:47,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:47,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:47,183 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:47,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 08:28:47,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-07 08:28:47,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:47,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 165 conjunts are in the unsatisfiable core [2021-11-07 08:28:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:49,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:49,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401375709] [2021-11-07 08:28:49,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:49,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075898547] [2021-11-07 08:28:49,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075898547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:49,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:49,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-11-07 08:28:49,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142502409] [2021-11-07 08:28:49,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 08:28:49,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 08:28:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:28:49,193 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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) [2021-11-07 08:28:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:50,201 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-11-07 08:28:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:28:50,213 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 46 [2021-11-07 08:28:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:50,214 INFO L225 Difference]: With dead ends: 51 [2021-11-07 08:28:50,214 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 08:28:50,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:28:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 08:28:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-07 08:28:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-11-07 08:28:50,220 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-11-07 08:28:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:50,220 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-11-07 08:28:50,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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) [2021-11-07 08:28:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-11-07 08:28:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:28:50,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:50,222 INFO L513 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:50,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:50,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:28:50,449 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -88990389, now seen corresponding path program 40 times [2021-11-07 08:28:50,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:50,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394370534] [2021-11-07 08:28:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:50,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:50,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:50,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567910965] [2021-11-07 08:28:50,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:28:50,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:50,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:50,463 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:50,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 08:28:51,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:28:51,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:51,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 168 conjunts are in the unsatisfiable core [2021-11-07 08:28:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:52,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:52,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394370534] [2021-11-07 08:28:52,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:52,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567910965] [2021-11-07 08:28:52,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567910965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:52,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:52,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-11-07 08:28:52,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920565139] [2021-11-07 08:28:52,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 08:28:52,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 08:28:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:28:52,354 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 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) [2021-11-07 08:28:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:53,437 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-11-07 08:28:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:28:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 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 47 [2021-11-07 08:28:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:53,438 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:28:53,438 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 08:28:53,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:28:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 08:28:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 08:28:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 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) [2021-11-07 08:28:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-07 08:28:53,443 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-11-07 08:28:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:53,444 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-07 08:28:53,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 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) [2021-11-07 08:28:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-07 08:28:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:28:53,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:53,445 INFO L513 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:53,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-07 08:28:53,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:53,669 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1536202763, now seen corresponding path program 41 times [2021-11-07 08:28:53,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:53,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590773863] [2021-11-07 08:28:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:53,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:53,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:53,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519846728] [2021-11-07 08:28:53,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:28:53,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:53,688 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:53,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 08:28:54,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-07 08:28:54,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:54,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 172 conjunts are in the unsatisfiable core [2021-11-07 08:28:54,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:55,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:55,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590773863] [2021-11-07 08:28:55,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:55,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519846728] [2021-11-07 08:28:55,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519846728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:55,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:55,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-11-07 08:28:55,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039076271] [2021-11-07 08:28:55,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 08:28:55,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 08:28:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:28:55,525 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:56,654 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-11-07 08:28:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 08:28:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 08:28:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:56,655 INFO L225 Difference]: With dead ends: 53 [2021-11-07 08:28:56,655 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 08:28:56,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:28:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 08:28:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-07 08:28:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-11-07 08:28:56,664 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-11-07 08:28:56,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:56,664 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-11-07 08:28:56,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:28:56,664 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-11-07 08:28:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 08:28:56,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:56,677 INFO L513 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:56,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 08:28:56,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:56,877 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:28:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:28:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 377582923, now seen corresponding path program 42 times [2021-11-07 08:28:56,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:28:56,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922510524] [2021-11-07 08:28:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:28:56,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:28:56,891 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:28:56,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791809518] [2021-11-07 08:28:56,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:28:56,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:28:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:28:56,894 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:28:56,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 08:28:57,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-11-07 08:28:57,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:28:57,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 176 conjunts are in the unsatisfiable core [2021-11-07 08:28:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:28:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:28:58,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:28:58,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922510524] [2021-11-07 08:28:58,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:28:58,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791809518] [2021-11-07 08:28:58,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791809518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:28:58,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:28:58,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-11-07 08:28:58,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654895417] [2021-11-07 08:28:58,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 08:28:58,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:28:58,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 08:28:58,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:28:58,769 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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) [2021-11-07 08:28:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:28:59,954 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-11-07 08:28:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:28:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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 49 [2021-11-07 08:28:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:28:59,955 INFO L225 Difference]: With dead ends: 54 [2021-11-07 08:28:59,955 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 08:28:59,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:28:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 08:28:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-07 08:28:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 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) [2021-11-07 08:28:59,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-07 08:28:59,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-11-07 08:28:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:28:59,959 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-07 08:28:59,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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) [2021-11-07 08:28:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-07 08:28:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 08:28:59,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:28:59,960 INFO L513 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:28:59,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:00,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-07 08:29:00,165 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1179893749, now seen corresponding path program 43 times [2021-11-07 08:29:00,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:00,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460123807] [2021-11-07 08:29:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:00,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:00,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:00,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605735163] [2021-11-07 08:29:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:29:00,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:00,178 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:00,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 08:29:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:29:00,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 180 conjunts are in the unsatisfiable core [2021-11-07 08:29:00,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:02,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:02,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460123807] [2021-11-07 08:29:02,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:02,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605735163] [2021-11-07 08:29:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605735163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:02,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:02,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-11-07 08:29:02,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155287068] [2021-11-07 08:29:02,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 08:29:02,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 08:29:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:29:02,237 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:03,544 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-11-07 08:29:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 08:29:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 08:29:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:03,545 INFO L225 Difference]: With dead ends: 55 [2021-11-07 08:29:03,545 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 08:29:03,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:29:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 08:29:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-07 08:29:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 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) [2021-11-07 08:29:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-11-07 08:29:03,550 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-11-07 08:29:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:03,550 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-11-07 08:29:03,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-11-07 08:29:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 08:29:03,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:03,551 INFO L513 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:03,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-07 08:29:03,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:03,751 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2077936971, now seen corresponding path program 44 times [2021-11-07 08:29:03,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:03,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379652529] [2021-11-07 08:29:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:03,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:03,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:03,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613393206] [2021-11-07 08:29:03,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:29:03,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:03,766 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:03,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 08:29:04,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:29:04,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:04,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 185 conjunts are in the unsatisfiable core [2021-11-07 08:29:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:06,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:06,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379652529] [2021-11-07 08:29:06,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:06,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613393206] [2021-11-07 08:29:06,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613393206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:06,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:06,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-11-07 08:29:06,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343884320] [2021-11-07 08:29:06,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 08:29:06,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:06,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 08:29:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 08:29:06,076 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 49 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 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) [2021-11-07 08:29:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:07,550 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-11-07 08:29:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 08:29:07,551 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 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 51 [2021-11-07 08:29:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:07,551 INFO L225 Difference]: With dead ends: 56 [2021-11-07 08:29:07,551 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 08:29:07,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:29:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 08:29:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-07 08:29:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 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) [2021-11-07 08:29:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-11-07 08:29:07,557 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-11-07 08:29:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:07,558 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-11-07 08:29:07,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 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) [2021-11-07 08:29:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-11-07 08:29:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:29:07,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:07,559 INFO L513 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:07,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:07,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 08:29:07,765 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:07,765 INFO L85 PathProgramCache]: Analyzing trace with hash -8525813, now seen corresponding path program 45 times [2021-11-07 08:29:07,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:07,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055396543] [2021-11-07 08:29:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:07,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:07,802 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:07,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893693156] [2021-11-07 08:29:07,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:29:07,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:07,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:07,804 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:07,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 08:29:08,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-07 08:29:08,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:08,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 188 conjunts are in the unsatisfiable core [2021-11-07 08:29:08,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:10,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:10,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055396543] [2021-11-07 08:29:10,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:10,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893693156] [2021-11-07 08:29:10,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893693156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:10,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:10,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-11-07 08:29:10,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519802083] [2021-11-07 08:29:10,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 08:29:10,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 08:29:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 08:29:10,073 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 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) [2021-11-07 08:29:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:11,666 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-11-07 08:29:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 08:29:11,666 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 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 52 [2021-11-07 08:29:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:11,666 INFO L225 Difference]: With dead ends: 57 [2021-11-07 08:29:11,667 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 08:29:11,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:29:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 08:29:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-07 08:29:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-11-07 08:29:11,671 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-11-07 08:29:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:11,671 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-11-07 08:29:11,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 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) [2021-11-07 08:29:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-11-07 08:29:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:29:11,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:11,671 INFO L513 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:11,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-07 08:29:11,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-07 08:29:11,872 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash -264362677, now seen corresponding path program 46 times [2021-11-07 08:29:11,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:11,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205599380] [2021-11-07 08:29:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:11,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:11,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:11,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015422547] [2021-11-07 08:29:11,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:29:11,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:11,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:11,890 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:11,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 08:29:12,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:29:12,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:12,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-07 08:29:12,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:14,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:14,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205599380] [2021-11-07 08:29:14,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:14,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015422547] [2021-11-07 08:29:14,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015422547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:14,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:14,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-11-07 08:29:14,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457170048] [2021-11-07 08:29:14,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 08:29:14,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:14,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 08:29:14,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:29:14,205 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 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) [2021-11-07 08:29:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:15,998 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-11-07 08:29:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 08:29:15,998 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 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 53 [2021-11-07 08:29:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:15,999 INFO L225 Difference]: With dead ends: 58 [2021-11-07 08:29:15,999 INFO L226 Difference]: Without dead ends: 55 [2021-11-07 08:29:15,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 08:29:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-07 08:29:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-07 08:29:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 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) [2021-11-07 08:29:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-11-07 08:29:16,003 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-11-07 08:29:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:16,003 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-11-07 08:29:16,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 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) [2021-11-07 08:29:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-11-07 08:29:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:29:16,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:16,004 INFO L513 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:16,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-07 08:29:16,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:16,204 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:16,204 INFO L85 PathProgramCache]: Analyzing trace with hash 394629131, now seen corresponding path program 47 times [2021-11-07 08:29:16,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:16,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420782413] [2021-11-07 08:29:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:16,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:16,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:16,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969090823] [2021-11-07 08:29:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:29:16,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:16,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:16,221 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:16,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 08:29:17,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-11-07 08:29:17,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:17,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 196 conjunts are in the unsatisfiable core [2021-11-07 08:29:17,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:18,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:18,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420782413] [2021-11-07 08:29:18,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:18,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969090823] [2021-11-07 08:29:18,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969090823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:18,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:18,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-11-07 08:29:18,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876818282] [2021-11-07 08:29:18,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 08:29:18,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:18,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 08:29:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 08:29:18,689 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:20,557 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-11-07 08:29:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 08:29:20,557 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 08:29:20,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:20,558 INFO L225 Difference]: With dead ends: 59 [2021-11-07 08:29:20,558 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 08:29:20,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:29:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 08:29:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-07 08:29:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-11-07 08:29:20,566 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-11-07 08:29:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:20,567 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-11-07 08:29:20,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-11-07 08:29:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:29:20,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:20,568 INFO L513 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:20,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-07 08:29:20,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 08:29:20,783 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash -651461301, now seen corresponding path program 48 times [2021-11-07 08:29:20,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:20,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430422066] [2021-11-07 08:29:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:20,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:20,805 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:20,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127965524] [2021-11-07 08:29:20,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:29:20,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:20,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:20,807 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:20,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 08:29:21,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 08:29:21,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:21,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 200 conjunts are in the unsatisfiable core [2021-11-07 08:29:21,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:23,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:23,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430422066] [2021-11-07 08:29:23,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:23,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127965524] [2021-11-07 08:29:23,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127965524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:23,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:23,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-11-07 08:29:23,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403986007] [2021-11-07 08:29:23,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 08:29:23,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 08:29:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:29:23,157 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 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) [2021-11-07 08:29:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:24,955 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-11-07 08:29:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 08:29:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 08:29:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:24,956 INFO L225 Difference]: With dead ends: 60 [2021-11-07 08:29:24,956 INFO L226 Difference]: Without dead ends: 57 [2021-11-07 08:29:24,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:29:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-07 08:29:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-07 08:29:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 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) [2021-11-07 08:29:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-11-07 08:29:24,960 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-11-07 08:29:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:24,960 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-11-07 08:29:24,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 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) [2021-11-07 08:29:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-11-07 08:29:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:29:24,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:24,961 INFO L513 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:24,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:25,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 08:29:25,161 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:25,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:25,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1279473675, now seen corresponding path program 49 times [2021-11-07 08:29:25,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:25,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075779349] [2021-11-07 08:29:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:25,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:25,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:25,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606710982] [2021-11-07 08:29:25,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:29:25,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:25,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:25,180 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:25,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 08:29:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:29:26,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 204 conjunts are in the unsatisfiable core [2021-11-07 08:29:26,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:27,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:27,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075779349] [2021-11-07 08:29:27,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:27,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606710982] [2021-11-07 08:29:27,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606710982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:27,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:27,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-11-07 08:29:27,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549045004] [2021-11-07 08:29:27,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 08:29:27,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 08:29:27,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:29:27,740 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:29,908 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-11-07 08:29:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 08:29:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 08:29:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:29,909 INFO L225 Difference]: With dead ends: 61 [2021-11-07 08:29:29,910 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 08:29:29,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:29:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 08:29:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-07 08:29:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 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) [2021-11-07 08:29:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-11-07 08:29:29,917 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-11-07 08:29:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:29,917 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-11-07 08:29:29,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-11-07 08:29:29,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:29:29,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:29,918 INFO L513 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:29,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:30,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 08:29:30,119 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1008915787, now seen corresponding path program 50 times [2021-11-07 08:29:30,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:30,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587820539] [2021-11-07 08:29:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:30,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:30,135 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:30,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454520510] [2021-11-07 08:29:30,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:29:30,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:30,137 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:30,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 08:29:31,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:29:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:31,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 208 conjunts are in the unsatisfiable core [2021-11-07 08:29:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:32,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:32,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587820539] [2021-11-07 08:29:32,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:32,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454520510] [2021-11-07 08:29:32,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454520510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:32,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:32,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2021-11-07 08:29:32,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951632141] [2021-11-07 08:29:32,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 08:29:32,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:32,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 08:29:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:29:32,692 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 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) [2021-11-07 08:29:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:34,838 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-07 08:29:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 08:29:34,839 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 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 57 [2021-11-07 08:29:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:34,840 INFO L225 Difference]: With dead ends: 62 [2021-11-07 08:29:34,840 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 08:29:34,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:29:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 08:29:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-07 08:29:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 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) [2021-11-07 08:29:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-11-07 08:29:34,860 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-11-07 08:29:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:34,861 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-11-07 08:29:34,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 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) [2021-11-07 08:29:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-11-07 08:29:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:29:34,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:34,862 INFO L513 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:34,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:35,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:35,065 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1211555851, now seen corresponding path program 51 times [2021-11-07 08:29:35,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:35,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832617890] [2021-11-07 08:29:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:35,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:35,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:35,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112016667] [2021-11-07 08:29:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:29:35,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:35,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:35,083 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:35,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 08:29:36,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-07 08:29:36,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:36,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 212 conjunts are in the unsatisfiable core [2021-11-07 08:29:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:37,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:37,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832617890] [2021-11-07 08:29:37,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:37,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112016667] [2021-11-07 08:29:37,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112016667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:37,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:37,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2021-11-07 08:29:37,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370787121] [2021-11-07 08:29:37,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 08:29:37,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 08:29:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:29:37,773 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 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) [2021-11-07 08:29:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:40,373 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-11-07 08:29:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 08:29:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 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 58 [2021-11-07 08:29:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:40,375 INFO L225 Difference]: With dead ends: 63 [2021-11-07 08:29:40,375 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 08:29:40,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:29:40,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 08:29:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-07 08:29:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-11-07 08:29:40,381 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-11-07 08:29:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:40,382 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-11-07 08:29:40,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 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) [2021-11-07 08:29:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-11-07 08:29:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:29:40,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:40,383 INFO L513 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:40,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 08:29:40,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-07 08:29:40,593 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1096536757, now seen corresponding path program 52 times [2021-11-07 08:29:40,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:40,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601397303] [2021-11-07 08:29:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:40,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:40,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:40,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763317487] [2021-11-07 08:29:40,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:29:40,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:40,626 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:40,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 08:29:41,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:29:41,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:41,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 216 conjunts are in the unsatisfiable core [2021-11-07 08:29:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:43,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:43,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601397303] [2021-11-07 08:29:43,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:43,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763317487] [2021-11-07 08:29:43,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763317487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:43,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:43,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-11-07 08:29:43,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50425200] [2021-11-07 08:29:43,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 08:29:43,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:43,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 08:29:43,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:29:43,421 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 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) [2021-11-07 08:29:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:46,400 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-11-07 08:29:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 08:29:46,400 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 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 59 [2021-11-07 08:29:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:46,401 INFO L225 Difference]: With dead ends: 64 [2021-11-07 08:29:46,401 INFO L226 Difference]: Without dead ends: 61 [2021-11-07 08:29:46,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 08:29:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-07 08:29:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-07 08:29:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 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) [2021-11-07 08:29:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-11-07 08:29:46,407 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-11-07 08:29:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:46,408 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-11-07 08:29:46,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 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) [2021-11-07 08:29:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-11-07 08:29:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:29:46,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:46,409 INFO L513 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:46,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-07 08:29:46,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-07 08:29:46,617 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:46,617 INFO L85 PathProgramCache]: Analyzing trace with hash 367036427, now seen corresponding path program 53 times [2021-11-07 08:29:46,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:46,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627242658] [2021-11-07 08:29:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:46,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:46,630 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:46,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19455367] [2021-11-07 08:29:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:29:46,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:46,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:46,650 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:46,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 08:29:47,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-11-07 08:29:47,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:47,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 220 conjunts are in the unsatisfiable core [2021-11-07 08:29:47,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:49,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:49,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627242658] [2021-11-07 08:29:49,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:49,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19455367] [2021-11-07 08:29:49,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19455367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:49,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:49,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2021-11-07 08:29:49,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219946841] [2021-11-07 08:29:49,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 08:29:49,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 08:29:49,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 08:29:49,498 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:52,591 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-11-07 08:29:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-07 08:29:52,591 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 08:29:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:52,592 INFO L225 Difference]: With dead ends: 65 [2021-11-07 08:29:52,592 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:29:52,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 08:29:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:29:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-07 08:29:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 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) [2021-11-07 08:29:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-11-07 08:29:52,602 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-11-07 08:29:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:52,602 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-11-07 08:29:52,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:29:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-11-07 08:29:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:29:52,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:52,603 INFO L513 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:52,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:52,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:52,804 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1506835125, now seen corresponding path program 54 times [2021-11-07 08:29:52,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:52,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011528024] [2021-11-07 08:29:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:52,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:52,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:52,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489170479] [2021-11-07 08:29:52,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:29:52,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:52,821 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:29:52,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 08:29:54,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-11-07 08:29:54,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:29:54,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 224 conjunts are in the unsatisfiable core [2021-11-07 08:29:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:29:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:29:55,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:29:55,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011528024] [2021-11-07 08:29:55,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:29:55,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489170479] [2021-11-07 08:29:55,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489170479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:29:55,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:29:55,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-11-07 08:29:55,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492026042] [2021-11-07 08:29:55,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-07 08:29:55,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:29:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-07 08:29:55,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 08:29:55,927 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 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) [2021-11-07 08:29:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:29:59,753 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-11-07 08:29:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 08:29:59,753 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 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 61 [2021-11-07 08:29:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:29:59,754 INFO L225 Difference]: With dead ends: 66 [2021-11-07 08:29:59,754 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 08:29:59,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:29:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 08:29:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-07 08:29:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 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) [2021-11-07 08:29:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-11-07 08:29:59,759 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-11-07 08:29:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:29:59,759 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-11-07 08:29:59,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 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) [2021-11-07 08:29:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-11-07 08:29:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:29:59,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:29:59,760 INFO L513 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:29:59,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 08:29:59,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-07 08:29:59,965 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:29:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:29:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash 532688907, now seen corresponding path program 55 times [2021-11-07 08:29:59,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:29:59,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859446646] [2021-11-07 08:29:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:29:59,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:29:59,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:29:59,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465039814] [2021-11-07 08:29:59,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:29:59,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:29:59,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:29:59,995 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:00,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 08:30:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:30:01,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 228 conjunts are in the unsatisfiable core [2021-11-07 08:30:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:03,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:03,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859446646] [2021-11-07 08:30:03,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:30:03,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465039814] [2021-11-07 08:30:03,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465039814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:03,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:30:03,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2021-11-07 08:30:03,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738133523] [2021-11-07 08:30:03,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 08:30:03,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 08:30:03,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:30:03,128 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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) [2021-11-07 08:30:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:07,433 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-11-07 08:30:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 08:30:07,434 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:30:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:07,435 INFO L225 Difference]: With dead ends: 67 [2021-11-07 08:30:07,435 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 08:30:07,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:30:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 08:30:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-07 08:30:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 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) [2021-11-07 08:30:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-11-07 08:30:07,456 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-11-07 08:30:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:07,457 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-11-07 08:30:07,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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) [2021-11-07 08:30:07,457 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-11-07 08:30:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:30:07,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:07,457 INFO L513 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:07,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-07 08:30:07,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:07,658 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:07,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:07,658 INFO L85 PathProgramCache]: Analyzing trace with hash -666575541, now seen corresponding path program 56 times [2021-11-07 08:30:07,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:30:07,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201975524] [2021-11-07 08:30:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:07,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:30:07,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:30:07,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866679446] [2021-11-07 08:30:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:30:07,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:07,684 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:07,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 08:30:08,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:30:08,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:30:08,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 232 conjunts are in the unsatisfiable core [2021-11-07 08:30:08,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:10,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:10,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201975524] [2021-11-07 08:30:10,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:30:10,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866679446] [2021-11-07 08:30:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866679446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:10,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:30:10,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-11-07 08:30:10,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721846879] [2021-11-07 08:30:10,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 08:30:10,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 08:30:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:30:10,770 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 60 states, 60 states have (on average 1.05) internal successors, (63), 60 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) [2021-11-07 08:30:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:14,677 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-11-07 08:30:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 08:30:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:30:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:14,678 INFO L225 Difference]: With dead ends: 68 [2021-11-07 08:30:14,678 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 08:30:14,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:30:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 08:30:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-07 08:30:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 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) [2021-11-07 08:30:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-11-07 08:30:14,683 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-11-07 08:30:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:14,683 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-11-07 08:30:14,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.05) internal successors, (63), 60 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) [2021-11-07 08:30:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-11-07 08:30:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:30:14,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:14,684 INFO L513 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:14,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-07 08:30:14,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:14,884 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash 810932235, now seen corresponding path program 57 times [2021-11-07 08:30:14,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:30:14,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376403823] [2021-11-07 08:30:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:14,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:30:14,907 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:30:14,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028017552] [2021-11-07 08:30:14,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:30:14,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:14,909 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:14,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 08:30:16,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-07 08:30:16,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:30:16,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 236 conjunts are in the unsatisfiable core [2021-11-07 08:30:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:18,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:18,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376403823] [2021-11-07 08:30:18,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:30:18,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028017552] [2021-11-07 08:30:18,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028017552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:18,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:30:18,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2021-11-07 08:30:18,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920013830] [2021-11-07 08:30:18,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 08:30:18,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:18,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 08:30:18,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:30:18,197 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 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) [2021-11-07 08:30:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:22,971 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-11-07 08:30:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-07 08:30:22,971 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 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 64 [2021-11-07 08:30:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:22,972 INFO L225 Difference]: With dead ends: 69 [2021-11-07 08:30:22,972 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 08:30:22,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:30:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 08:30:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-07 08:30:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 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) [2021-11-07 08:30:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-11-07 08:30:22,981 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-11-07 08:30:22,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:22,982 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-11-07 08:30:22,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 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) [2021-11-07 08:30:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-11-07 08:30:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:30:22,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:22,982 INFO L513 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:23,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-07 08:30:23,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:23,183 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash -630966965, now seen corresponding path program 58 times [2021-11-07 08:30:23,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:30:23,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105374112] [2021-11-07 08:30:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:23,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:30:23,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:30:23,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770513542] [2021-11-07 08:30:23,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:30:23,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:23,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:23,217 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:23,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 08:30:24,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:30:24,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:30:24,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 240 conjunts are in the unsatisfiable core [2021-11-07 08:30:24,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:26,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:26,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105374112] [2021-11-07 08:30:26,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:30:26,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770513542] [2021-11-07 08:30:26,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770513542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:26,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:30:26,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-11-07 08:30:26,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209197961] [2021-11-07 08:30:26,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 08:30:26,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:26,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 08:30:26,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:30:26,693 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 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) [2021-11-07 08:30:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:32,213 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-11-07 08:30:32,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 08:30:32,213 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 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 65 [2021-11-07 08:30:32,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:32,214 INFO L225 Difference]: With dead ends: 70 [2021-11-07 08:30:32,214 INFO L226 Difference]: Without dead ends: 67 [2021-11-07 08:30:32,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:30:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-07 08:30:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-07 08:30:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 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) [2021-11-07 08:30:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-11-07 08:30:32,221 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-11-07 08:30:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:32,221 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-11-07 08:30:32,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 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) [2021-11-07 08:30:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-11-07 08:30:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:30:32,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:32,223 INFO L513 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:32,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-07 08:30:32,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:32,423 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1914798091, now seen corresponding path program 59 times [2021-11-07 08:30:32,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:30:32,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849584424] [2021-11-07 08:30:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:32,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:30:32,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:30:32,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906103318] [2021-11-07 08:30:32,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:30:32,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:32,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:32,442 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:32,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 08:30:33,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-07 08:30:33,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:30:33,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 244 conjunts are in the unsatisfiable core [2021-11-07 08:30:33,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:35,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:35,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849584424] [2021-11-07 08:30:35,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:30:35,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906103318] [2021-11-07 08:30:35,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906103318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:35,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:30:35,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2021-11-07 08:30:35,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543052134] [2021-11-07 08:30:35,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 08:30:35,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 08:30:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:30:35,837 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 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) [2021-11-07 08:30:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:42,098 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-11-07 08:30:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 08:30:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:30:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:42,099 INFO L225 Difference]: With dead ends: 71 [2021-11-07 08:30:42,099 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 08:30:42,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:30:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 08:30:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-07 08:30:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 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) [2021-11-07 08:30:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-11-07 08:30:42,106 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-11-07 08:30:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:42,106 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-11-07 08:30:42,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 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) [2021-11-07 08:30:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-11-07 08:30:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:30:42,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:42,108 INFO L513 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:42,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-07 08:30:42,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 08:30:42,321 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash -770863797, now seen corresponding path program 60 times [2021-11-07 08:30:42,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:30:42,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652759257] [2021-11-07 08:30:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:42,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:30:42,354 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:30:42,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682679682] [2021-11-07 08:30:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:30:42,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:42,360 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:42,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 08:30:43,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 08:30:43,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:30:43,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 249 conjunts are in the unsatisfiable core [2021-11-07 08:30:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:46,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:46,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652759257] [2021-11-07 08:30:46,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:30:46,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682679682] [2021-11-07 08:30:46,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682679682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:46,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:30:46,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2021-11-07 08:30:46,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539632516] [2021-11-07 08:30:46,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 08:30:46,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 08:30:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 08:30:46,366 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 65 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 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) [2021-11-07 08:30:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:30:52,909 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-11-07 08:30:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 08:30:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 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 67 [2021-11-07 08:30:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:30:52,910 INFO L225 Difference]: With dead ends: 72 [2021-11-07 08:30:52,910 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 08:30:52,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:30:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 08:30:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-07 08:30:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 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) [2021-11-07 08:30:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-11-07 08:30:52,916 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2021-11-07 08:30:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:30:52,916 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-11-07 08:30:52,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 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) [2021-11-07 08:30:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-11-07 08:30:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:30:52,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:30:52,917 INFO L513 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:30:52,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-07 08:30:53,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:53,117 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:30:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:30:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1872963595, now seen corresponding path program 61 times [2021-11-07 08:30:53,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:30:53,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011829814] [2021-11-07 08:30:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:30:53,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:30:53,135 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:30:53,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858864985] [2021-11-07 08:30:53,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:30:53,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:30:53,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:30:53,157 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:30:53,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 08:30:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:30:54,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 252 conjunts are in the unsatisfiable core [2021-11-07 08:30:54,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:30:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:30:57,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:30:57,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011829814] [2021-11-07 08:30:57,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:30:57,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858864985] [2021-11-07 08:30:57,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858864985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:30:57,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:30:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2021-11-07 08:30:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527105968] [2021-11-07 08:30:57,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 08:30:57,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:30:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 08:30:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 08:30:57,116 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 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) [2021-11-07 08:31:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:05,927 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-11-07 08:31:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 08:31:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 08:31:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:05,928 INFO L225 Difference]: With dead ends: 73 [2021-11-07 08:31:05,928 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 08:31:05,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:31:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 08:31:05,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 08:31:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 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) [2021-11-07 08:31:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-11-07 08:31:05,934 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2021-11-07 08:31:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:05,935 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-11-07 08:31:05,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 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) [2021-11-07 08:31:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-11-07 08:31:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 08:31:05,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:05,936 INFO L513 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:05,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:06,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:06,145 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:06,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2067733173, now seen corresponding path program 62 times [2021-11-07 08:31:06,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:06,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359842186] [2021-11-07 08:31:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:06,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:06,163 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:06,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956249914] [2021-11-07 08:31:06,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:31:06,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:06,165 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:06,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 08:31:07,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:31:07,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:07,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 256 conjunts are in the unsatisfiable core [2021-11-07 08:31:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:10,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:10,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359842186] [2021-11-07 08:31:10,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:10,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956249914] [2021-11-07 08:31:10,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956249914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:10,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:10,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2021-11-07 08:31:10,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197844182] [2021-11-07 08:31:10,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 08:31:10,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 08:31:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:31:10,034 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 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) [2021-11-07 08:31:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:19,152 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-11-07 08:31:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 08:31:19,152 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 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 69 [2021-11-07 08:31:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:19,153 INFO L225 Difference]: With dead ends: 74 [2021-11-07 08:31:19,153 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 08:31:19,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:31:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 08:31:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-07 08:31:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 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) [2021-11-07 08:31:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-11-07 08:31:19,158 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-11-07 08:31:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:19,159 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-11-07 08:31:19,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 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) [2021-11-07 08:31:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-11-07 08:31:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:31:19,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:19,159 INFO L513 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:19,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:19,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:19,360 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash 324718603, now seen corresponding path program 63 times [2021-11-07 08:31:19,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:19,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946154700] [2021-11-07 08:31:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:19,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:19,379 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:19,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25972071] [2021-11-07 08:31:19,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:31:19,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:19,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:19,380 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:19,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 08:31:20,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-11-07 08:31:20,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:20,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 260 conjunts are in the unsatisfiable core [2021-11-07 08:31:20,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:23,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:23,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946154700] [2021-11-07 08:31:23,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:23,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25972071] [2021-11-07 08:31:23,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25972071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:23,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:23,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2021-11-07 08:31:23,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530599998] [2021-11-07 08:31:23,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 08:31:23,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:23,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 08:31:23,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:31:23,364 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 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) [2021-11-07 08:31:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:33,588 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-11-07 08:31:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 08:31:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 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 70 [2021-11-07 08:31:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:33,590 INFO L225 Difference]: With dead ends: 75 [2021-11-07 08:31:33,590 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 08:31:33,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 08:31:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 08:31:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-07 08:31:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 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) [2021-11-07 08:31:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-11-07 08:31:33,596 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-11-07 08:31:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:33,596 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-11-07 08:31:33,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 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) [2021-11-07 08:31:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-11-07 08:31:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:31:33,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:33,598 INFO L513 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:33,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:33,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:33,825 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1476279627, now seen corresponding path program 64 times [2021-11-07 08:31:33,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:33,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629549154] [2021-11-07 08:31:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:33,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:33,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:33,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159177058] [2021-11-07 08:31:33,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:31:33,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:33,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:33,844 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:33,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 08:31:35,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:31:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:35,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 264 conjunts are in the unsatisfiable core [2021-11-07 08:31:35,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:37,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:37,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629549154] [2021-11-07 08:31:37,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:37,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159177058] [2021-11-07 08:31:37,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159177058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:37,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:37,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2021-11-07 08:31:37,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785591064] [2021-11-07 08:31:37,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 08:31:37,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 08:31:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 08:31:37,901 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 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) [2021-11-07 08:31:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:49,721 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-11-07 08:31:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 08:31:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 08:31:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:49,722 INFO L225 Difference]: With dead ends: 76 [2021-11-07 08:31:49,722 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 08:31:49,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 08:31:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 08:31:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-07 08:31:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 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) [2021-11-07 08:31:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-11-07 08:31:49,731 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2021-11-07 08:31:49,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:49,732 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-11-07 08:31:49,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 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) [2021-11-07 08:31:49,732 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-11-07 08:31:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:31:49,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:49,732 INFO L513 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:49,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-07 08:31:49,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-07 08:31:49,933 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1480034293, now seen corresponding path program 65 times [2021-11-07 08:31:49,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:49,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099219054] [2021-11-07 08:31:49,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:49,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:49,952 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:49,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237745781] [2021-11-07 08:31:49,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:31:49,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:49,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:49,954 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:49,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 08:31:51,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-11-07 08:31:51,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:51,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 268 conjunts are in the unsatisfiable core [2021-11-07 08:31:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:54,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:54,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099219054] [2021-11-07 08:31:54,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:54,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237745781] [2021-11-07 08:31:54,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237745781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:54,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:54,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2021-11-07 08:31:54,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420344506] [2021-11-07 08:31:54,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 08:31:54,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 08:31:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 08:31:54,181 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 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) [2021-11-07 08:32:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:06,470 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-11-07 08:32:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 08:32:06,470 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 08:32:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:06,471 INFO L225 Difference]: With dead ends: 77 [2021-11-07 08:32:06,471 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 08:32:06,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 08:32:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 08:32:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-07 08:32:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-11-07 08:32:06,477 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2021-11-07 08:32:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:06,478 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-11-07 08:32:06,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 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) [2021-11-07 08:32:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-11-07 08:32:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 08:32:06,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:06,479 INFO L513 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:06,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-07 08:32:06,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:06,689 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:06,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1363514699, now seen corresponding path program 66 times [2021-11-07 08:32:06,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:06,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928019594] [2021-11-07 08:32:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:06,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:06,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:32:06,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311733765] [2021-11-07 08:32:06,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:32:06,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:06,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:06,723 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:32:06,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 08:32:08,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-11-07 08:32:08,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:32:08,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 272 conjunts are in the unsatisfiable core [2021-11-07 08:32:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:32:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:11,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:11,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928019594] [2021-11-07 08:32:11,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:32:11,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311733765] [2021-11-07 08:32:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311733765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:11,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:32:11,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2021-11-07 08:32:11,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529316517] [2021-11-07 08:32:11,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-07 08:32:11,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-07 08:32:11,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 08:32:11,448 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 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) [2021-11-07 08:32:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:24,985 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-11-07 08:32:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 08:32:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 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 73 [2021-11-07 08:32:24,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:24,986 INFO L225 Difference]: With dead ends: 78 [2021-11-07 08:32:24,986 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 08:32:24,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 08:32:24,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 08:32:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-07 08:32:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 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) [2021-11-07 08:32:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-11-07 08:32:24,995 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2021-11-07 08:32:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:24,995 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-11-07 08:32:24,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 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) [2021-11-07 08:32:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-11-07 08:32:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:32:24,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:24,995 INFO L513 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:25,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-07 08:32:25,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:25,197 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash -680779765, now seen corresponding path program 67 times [2021-11-07 08:32:25,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:25,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108962410] [2021-11-07 08:32:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:25,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:25,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:32:25,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046282341] [2021-11-07 08:32:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:32:25,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:25,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:25,219 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:32:25,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-07 08:32:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:27,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 276 conjunts are in the unsatisfiable core [2021-11-07 08:32:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:32:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:29,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:29,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108962410] [2021-11-07 08:32:29,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:32:29,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046282341] [2021-11-07 08:32:29,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046282341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:29,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:32:29,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2021-11-07 08:32:29,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454466976] [2021-11-07 08:32:29,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 08:32:29,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 08:32:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 08:32:29,713 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:43,595 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-11-07 08:32:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-07 08:32:43,595 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 08:32:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:43,596 INFO L225 Difference]: With dead ends: 79 [2021-11-07 08:32:43,596 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 08:32:43,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 08:32:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 08:32:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-07 08:32:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-11-07 08:32:43,605 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2021-11-07 08:32:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:43,605 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-11-07 08:32:43,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-11-07 08:32:43,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:32:43,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:43,607 INFO L513 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:43,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-07 08:32:43,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-07 08:32:43,833 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:43,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:43,833 INFO L85 PathProgramCache]: Analyzing trace with hash 370601291, now seen corresponding path program 68 times [2021-11-07 08:32:43,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:43,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008691779] [2021-11-07 08:32:43,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:43,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:43,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:32:43,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346715465] [2021-11-07 08:32:43,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:32:43,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:32:43,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:43,902 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:32:43,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-07 08:32:45,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:32:45,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:32:45,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 280 conjunts are in the unsatisfiable core [2021-11-07 08:32:45,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:32:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:48,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:48,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008691779] [2021-11-07 08:32:48,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:32:48,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346715465] [2021-11-07 08:32:48,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346715465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:48,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:32:48,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2021-11-07 08:32:48,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600025812] [2021-11-07 08:32:48,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-07 08:32:48,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:48,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-07 08:32:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 08:32:48,584 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 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) [2021-11-07 08:33:05,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:05,534 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-11-07 08:33:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 08:33:05,534 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 08:33:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:05,535 INFO L225 Difference]: With dead ends: 80 [2021-11-07 08:33:05,535 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 08:33:05,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 08:33:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 08:33:05,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-07 08:33:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 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) [2021-11-07 08:33:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-11-07 08:33:05,546 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2021-11-07 08:33:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:05,546 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-11-07 08:33:05,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 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) [2021-11-07 08:33:05,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-11-07 08:33:05,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:33:05,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:05,548 INFO L513 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:05,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:05,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-07 08:33:05,773 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1396324341, now seen corresponding path program 69 times [2021-11-07 08:33:05,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:05,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836794744] [2021-11-07 08:33:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:05,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:05,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:05,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535415662] [2021-11-07 08:33:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:33:05,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:05,794 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:05,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 08:33:07,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-11-07 08:33:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:07,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 285 conjunts are in the unsatisfiable core [2021-11-07 08:33:07,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:11,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:11,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836794744] [2021-11-07 08:33:11,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:11,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535415662] [2021-11-07 08:33:11,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535415662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:11,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:11,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-11-07 08:33:11,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966919511] [2021-11-07 08:33:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-07 08:33:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-07 08:33:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 08:33:11,609 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 74 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:28,258 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-11-07 08:33:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 08:33:28,258 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:33:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:28,259 INFO L225 Difference]: With dead ends: 81 [2021-11-07 08:33:28,259 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 08:33:28,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 08:33:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 08:33:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-07 08:33:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 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) [2021-11-07 08:33:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-11-07 08:33:28,269 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2021-11-07 08:33:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:28,269 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-11-07 08:33:28,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-11-07 08:33:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:33:28,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:28,270 INFO L513 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:28,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:28,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-07 08:33:28,485 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:28,485 INFO L85 PathProgramCache]: Analyzing trace with hash -336444085, now seen corresponding path program 70 times [2021-11-07 08:33:28,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:28,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518984072] [2021-11-07 08:33:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:28,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:28,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:28,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138113162] [2021-11-07 08:33:28,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:33:28,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:28,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:28,536 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:28,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-07 08:33:30,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:33:30,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:30,353 WARN L261 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 288 conjunts are in the unsatisfiable core [2021-11-07 08:33:30,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:33,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:33,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518984072] [2021-11-07 08:33:33,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:33,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138113162] [2021-11-07 08:33:33,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138113162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:33,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:33,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-11-07 08:33:33,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909222898] [2021-11-07 08:33:33,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-07 08:33:33,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:33,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-07 08:33:33,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 08:33:33,595 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 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) [2021-11-07 08:33:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:51,472 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-11-07 08:33:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 08:33:51,472 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 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 77 [2021-11-07 08:33:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:51,473 INFO L225 Difference]: With dead ends: 82 [2021-11-07 08:33:51,473 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 08:33:51,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 08:33:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 08:33:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-07 08:33:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 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) [2021-11-07 08:33:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-11-07 08:33:51,481 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2021-11-07 08:33:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:51,482 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-11-07 08:33:51,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 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) [2021-11-07 08:33:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-11-07 08:33:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:33:51,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:51,483 INFO L513 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:51,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:51,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-11-07 08:33:51,697 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1839894517, now seen corresponding path program 71 times [2021-11-07 08:33:51,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:51,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387887844] [2021-11-07 08:33:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:51,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:51,741 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:51,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222179590] [2021-11-07 08:33:51,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:33:51,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:51,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:51,743 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:51,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-07 08:33:53,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-11-07 08:33:53,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:33:53,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 292 conjunts are in the unsatisfiable core [2021-11-07 08:33:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:57,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:57,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387887844] [2021-11-07 08:33:57,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:57,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222179590] [2021-11-07 08:33:57,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222179590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:57,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:57,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2021-11-07 08:33:57,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873227961] [2021-11-07 08:33:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 08:33:57,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 08:33:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 08:33:57,204 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 75 states, 75 states have (on average 1.04) internal successors, (78), 75 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) [2021-11-07 08:34:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:18,181 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-11-07 08:34:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-07 08:34:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.04) internal successors, (78), 75 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 78 [2021-11-07 08:34:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:18,182 INFO L225 Difference]: With dead ends: 83 [2021-11-07 08:34:18,182 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 08:34:18,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 08:34:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 08:34:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-07 08:34:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:34:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-11-07 08:34:18,188 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2021-11-07 08:34:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:18,188 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-11-07 08:34:18,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.04) internal successors, (78), 75 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) [2021-11-07 08:34:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-11-07 08:34:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:34:18,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:18,189 INFO L513 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:18,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-11-07 08:34:18,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:18,390 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1202217653, now seen corresponding path program 72 times [2021-11-07 08:34:18,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:18,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122092642] [2021-11-07 08:34:18,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:18,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:18,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:34:18,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474896151] [2021-11-07 08:34:18,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:34:18,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:18,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:18,461 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:18,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 08:34:20,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-07 08:34:20,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:20,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 296 conjunts are in the unsatisfiable core [2021-11-07 08:34:20,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:23,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:23,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122092642] [2021-11-07 08:34:23,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:34:23,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474896151] [2021-11-07 08:34:23,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474896151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:23,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:34:23,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2021-11-07 08:34:23,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779138318] [2021-11-07 08:34:23,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-07 08:34:23,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-07 08:34:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 08:34:23,608 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 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) [2021-11-07 08:34:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:45,167 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-11-07 08:34:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-07 08:34:45,167 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 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 79 [2021-11-07 08:34:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:45,168 INFO L225 Difference]: With dead ends: 84 [2021-11-07 08:34:45,168 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 08:34:45,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 08:34:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 08:34:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-07 08:34:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0125) internal successors, (81), 80 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) [2021-11-07 08:34:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-11-07 08:34:45,176 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2021-11-07 08:34:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:45,176 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-11-07 08:34:45,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 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) [2021-11-07 08:34:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-11-07 08:34:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:34:45,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:45,178 INFO L513 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:45,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-11-07 08:34:45,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:45,393 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1385895947, now seen corresponding path program 73 times [2021-11-07 08:34:45,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:45,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694106318] [2021-11-07 08:34:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:45,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:45,425 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:34:45,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180318867] [2021-11-07 08:34:45,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:34:45,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:45,439 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:45,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-07 08:34:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:47,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 300 conjunts are in the unsatisfiable core [2021-11-07 08:34:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:52,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:52,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694106318] [2021-11-07 08:34:52,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:34:52,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180318867] [2021-11-07 08:34:52,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180318867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:52,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:34:52,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2021-11-07 08:34:52,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282330477] [2021-11-07 08:34:52,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-07 08:34:52,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:52,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-07 08:34:52,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 08:34:52,754 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:23,308 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-11-07 08:35:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-07 08:35:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 08:35:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:23,309 INFO L225 Difference]: With dead ends: 85 [2021-11-07 08:35:23,309 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 08:35:23,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:35:23,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 08:35:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-07 08:35:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-11-07 08:35:23,319 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2021-11-07 08:35:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:23,319 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-11-07 08:35:23,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:35:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-11-07 08:35:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 08:35:23,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:23,321 INFO L513 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:23,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-07 08:35:23,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-07 08:35:23,537 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:23,537 INFO L85 PathProgramCache]: Analyzing trace with hash 13038923, now seen corresponding path program 74 times [2021-11-07 08:35:23,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:23,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910978630] [2021-11-07 08:35:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:23,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:23,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:35:23,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287811454] [2021-11-07 08:35:23,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:35:23,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:23,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:23,564 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:23,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-07 08:35:25,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:35:25,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:25,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 304 conjunts are in the unsatisfiable core [2021-11-07 08:35:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:35:30,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:30,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910978630] [2021-11-07 08:35:30,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:35:30,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287811454] [2021-11-07 08:35:30,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287811454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:30,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:35:30,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2021-11-07 08:35:30,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122248300] [2021-11-07 08:35:30,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-07 08:35:30,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-07 08:35:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:35:30,571 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 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) [2021-11-07 08:35:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:57,738 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-11-07 08:35:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 08:35:57,739 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 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 81 [2021-11-07 08:35:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:57,740 INFO L225 Difference]: With dead ends: 86 [2021-11-07 08:35:57,740 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 08:35:57,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 08:35:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 08:35:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-07 08:35:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 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) [2021-11-07 08:35:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-11-07 08:35:57,753 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2021-11-07 08:35:57,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:57,754 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-11-07 08:35:57,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 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) [2021-11-07 08:35:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-11-07 08:35:57,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:35:57,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:57,755 INFO L513 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:57,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:57,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-07 08:35:57,981 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:35:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:57,981 INFO L85 PathProgramCache]: Analyzing trace with hash 404144139, now seen corresponding path program 75 times [2021-11-07 08:35:57,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:57,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603381064] [2021-11-07 08:35:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:57,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:58,001 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:35:58,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180700444] [2021-11-07 08:35:58,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:35:58,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:58,002 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:58,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 08:36:00,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-11-07 08:36:00,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:36:00,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 308 conjunts are in the unsatisfiable core [2021-11-07 08:36:00,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:36:05,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:05,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603381064] [2021-11-07 08:36:05,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:36:05,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180700444] [2021-11-07 08:36:05,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180700444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:05,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:36:05,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2021-11-07 08:36:05,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233443195] [2021-11-07 08:36:05,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 08:36:05,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 08:36:05,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 08:36:05,415 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:36:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:36,051 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-11-07 08:36:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 08:36:36,052 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 08:36:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:36,052 INFO L225 Difference]: With dead ends: 87 [2021-11-07 08:36:36,052 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 08:36:36,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 08:36:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 08:36:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-07 08:36:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:36:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-11-07 08:36:36,060 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2021-11-07 08:36:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:36,061 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-11-07 08:36:36,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:36:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-11-07 08:36:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 08:36:36,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:36,061 INFO L513 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:36,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-07 08:36:36,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:36,262 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:36:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:36,263 INFO L85 PathProgramCache]: Analyzing trace with hash -356496053, now seen corresponding path program 76 times [2021-11-07 08:36:36,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:36,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931316673] [2021-11-07 08:36:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:36,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:36,289 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:36:36,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033728223] [2021-11-07 08:36:36,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:36:36,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:36,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:36,291 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:36,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-07 08:36:38,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:36:38,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:36:38,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 312 conjunts are in the unsatisfiable core [2021-11-07 08:36:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:36:45,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:45,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931316673] [2021-11-07 08:36:45,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:36:45,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033728223] [2021-11-07 08:36:45,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033728223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:45,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:36:45,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-11-07 08:36:45,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624289388] [2021-11-07 08:36:45,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 08:36:45,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 08:36:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 08:36:45,742 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 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) [2021-11-07 08:37:25,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:25,157 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-11-07 08:37:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 08:37:25,158 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 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 83 [2021-11-07 08:37:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:25,159 INFO L225 Difference]: With dead ends: 88 [2021-11-07 08:37:25,159 INFO L226 Difference]: Without dead ends: 85 [2021-11-07 08:37:25,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 08:37:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-07 08:37:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-07 08:37:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 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) [2021-11-07 08:37:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-11-07 08:37:25,167 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2021-11-07 08:37:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:25,167 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-11-07 08:37:25,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 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) [2021-11-07 08:37:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-11-07 08:37:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:37:25,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:25,169 INFO L513 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:25,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-07 08:37:25,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-07 08:37:25,397 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:37:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1833461771, now seen corresponding path program 77 times [2021-11-07 08:37:25,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:25,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372795731] [2021-11-07 08:37:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:25,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:25,432 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:37:25,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674328024] [2021-11-07 08:37:25,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:37:25,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:25,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:25,434 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:25,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-07 08:37:27,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-11-07 08:37:27,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:37:27,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 316 conjunts are in the unsatisfiable core [2021-11-07 08:37:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:37:32,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:32,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372795731] [2021-11-07 08:37:32,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:37:32,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674328024] [2021-11-07 08:37:32,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674328024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:32,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:37:32,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2021-11-07 08:37:32,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176295752] [2021-11-07 08:37:32,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-07 08:37:32,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-07 08:37:32,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 08:37:32,726 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:01,728 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-11-07 08:38:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-07 08:38:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 08:38:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:01,729 INFO L225 Difference]: With dead ends: 89 [2021-11-07 08:38:01,729 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 08:38:01,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 08:38:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 08:38:01,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-07 08:38:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-11-07 08:38:01,737 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2021-11-07 08:38:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:01,737 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-11-07 08:38:01,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:38:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-11-07 08:38:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:38:01,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:01,738 INFO L513 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:01,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:01,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-07 08:38:01,953 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1002677579, now seen corresponding path program 78 times [2021-11-07 08:38:01,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:01,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276014018] [2021-11-07 08:38:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:01,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:01,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:38:01,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737500091] [2021-11-07 08:38:01,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:38:01,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:01,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:01,980 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:01,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-07 08:38:04,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-11-07 08:38:04,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:38:04,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 320 conjunts are in the unsatisfiable core [2021-11-07 08:38:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:12,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:12,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276014018] [2021-11-07 08:38:12,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:38:12,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737500091] [2021-11-07 08:38:12,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737500091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:12,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:38:12,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2021-11-07 08:38:12,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329400579] [2021-11-07 08:38:12,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-07 08:38:12,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-07 08:38:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 08:38:12,166 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 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) [2021-11-07 08:38:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:51,978 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-11-07 08:38:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 08:38:51,979 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 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 85 [2021-11-07 08:38:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:51,980 INFO L225 Difference]: With dead ends: 90 [2021-11-07 08:38:51,980 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 08:38:51,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 08:38:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 08:38:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-07 08:38:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 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) [2021-11-07 08:38:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-11-07 08:38:52,010 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2021-11-07 08:38:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:52,010 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-11-07 08:38:52,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 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) [2021-11-07 08:38:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-11-07 08:38:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 08:38:52,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:52,012 INFO L513 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:52,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:52,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-07 08:38:52,212 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:38:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1018171403, now seen corresponding path program 79 times [2021-11-07 08:38:52,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:52,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972266018] [2021-11-07 08:38:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:52,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:52,242 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:38:52,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020368258] [2021-11-07 08:38:52,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:38:52,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:52,243 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:52,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-07 08:38:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:54,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 324 conjunts are in the unsatisfiable core [2021-11-07 08:38:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:00,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:00,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972266018] [2021-11-07 08:39:00,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:39:00,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020368258] [2021-11-07 08:39:00,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020368258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:00,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:39:00,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2021-11-07 08:39:00,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115515407] [2021-11-07 08:39:00,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 08:39:00,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:00,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 08:39:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 08:39:00,767 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:42,026 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-11-07 08:39:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-07 08:39:42,026 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 08:39:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:42,027 INFO L225 Difference]: With dead ends: 91 [2021-11-07 08:39:42,027 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 08:39:42,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 08:39:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 08:39:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-07 08:39:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-11-07 08:39:42,035 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2021-11-07 08:39:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:42,035 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-11-07 08:39:42,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:39:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-11-07 08:39:42,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 08:39:42,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:42,036 INFO L513 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:42,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-07 08:39:42,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-07 08:39:42,237 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:39:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1498479947, now seen corresponding path program 80 times [2021-11-07 08:39:42,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:42,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676956417] [2021-11-07 08:39:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:42,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:42,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:39:42,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206721821] [2021-11-07 08:39:42,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:39:42,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:42,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:42,312 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:42,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-07 08:39:44,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:39:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:44,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 328 conjunts are in the unsatisfiable core [2021-11-07 08:39:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:50,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:50,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676956417] [2021-11-07 08:39:50,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:39:50,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206721821] [2021-11-07 08:39:50,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206721821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:50,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:39:50,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2021-11-07 08:39:50,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050752035] [2021-11-07 08:39:50,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-07 08:39:50,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-07 08:39:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 08:39:50,144 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 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) [2021-11-07 08:40:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:31,799 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-11-07 08:40:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-07 08:40:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 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 87 [2021-11-07 08:40:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:31,800 INFO L225 Difference]: With dead ends: 92 [2021-11-07 08:40:31,800 INFO L226 Difference]: Without dead ends: 89 [2021-11-07 08:40:31,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 08:40:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-07 08:40:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-07 08:40:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 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) [2021-11-07 08:40:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-11-07 08:40:31,808 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2021-11-07 08:40:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:31,809 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-11-07 08:40:31,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 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) [2021-11-07 08:40:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-11-07 08:40:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 08:40:31,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:31,810 INFO L513 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:31,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-07 08:40:32,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:32,017 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:32,017 INFO L85 PathProgramCache]: Analyzing trace with hash -791824373, now seen corresponding path program 81 times [2021-11-07 08:40:32,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:32,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538413089] [2021-11-07 08:40:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:32,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:32,075 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:40:32,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430105636] [2021-11-07 08:40:32,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:40:32,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:40:32,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:32,093 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:40:32,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec8b899e-431d-4384-8961-16344b19c7e3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-07 08:40:34,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-11-07 08:40:34,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:34,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 332 conjunts are in the unsatisfiable core [2021-11-07 08:40:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:43,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:43,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538413089] [2021-11-07 08:40:43,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:40:43,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430105636] [2021-11-07 08:40:43,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430105636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:40:43,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:40:43,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2021-11-07 08:40:43,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364814355] [2021-11-07 08:40:43,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-07 08:40:43,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-07 08:40:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 08:40:43,652 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 85 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)