./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg --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 c8661b1e533413e4de6576c4feab251d05a672526bd5f59b260c6cb9f9c05939 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...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:44:51,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:44:51,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:44:51,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:44:51,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:44:51,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:44:51,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:44:51,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:44:51,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:44:51,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:44:51,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:44:51,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:44:51,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:44:51,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:44:51,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:44:51,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:44:51,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:44:51,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:44:51,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:44:51,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:44:51,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:44:51,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:44:51,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:44:51,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:44:51,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:44:51,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:44:51,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:44:51,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:44:51,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:44:51,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:44:51,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:44:51,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:44:51,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:44:51,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:44:51,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:44:51,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:44:51,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:44:51,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:44:51,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:44:51,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:44:51,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:44:51,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:44:51,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:44:51,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:44:51,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:44:51,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:44:51,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:44:51,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:44:51,943 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:44:51,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:44:51,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:44:51,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:44:51,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:44:51,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:44:51,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:44:51,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:44:51,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:44:51,947 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:44:51,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:44:51,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:44:51,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:44:51,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:44:51,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:44:51,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:44:51,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:44:51,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:44:51,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:44:51,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:44:51,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:44:51,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:44:51,951 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:44:51,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:44:51,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:44:51,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:44:51,954 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_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8661b1e533413e4de6576c4feab251d05a672526bd5f59b260c6cb9f9c05939 [2021-10-28 09:44:52,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:44:52,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:44:52,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:44:52,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:44:52,285 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:44:52,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2021-10-28 09:44:52,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/data/fdaaa32bb/fc5b5db89fbc4f208a815f0bec611948/FLAGde966af01 [2021-10-28 09:44:52,883 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:44:52,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2021-10-28 09:44:52,890 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/data/fdaaa32bb/fc5b5db89fbc4f208a815f0bec611948/FLAGde966af01 [2021-10-28 09:44:53,251 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/data/fdaaa32bb/fc5b5db89fbc4f208a815f0bec611948 [2021-10-28 09:44:53,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:44:53,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:44:53,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:44:53,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:44:53,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:44:53,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d6e063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53, skipping insertion in model container [2021-10-28 09:44:53,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:44:53,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:44:53,457 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_8dec4d8a-dbbc-49a9-b436-abacb98c308a/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i[873,886] [2021-10-28 09:44:53,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:44:53,510 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:44:53,523 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_8dec4d8a-dbbc-49a9-b436-abacb98c308a/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i[873,886] [2021-10-28 09:44:53,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:44:53,541 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:44:53,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53 WrapperNode [2021-10-28 09:44:53,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:44:53,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:44:53,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:44:53,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:44:53,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:44:53,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:44:53,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:44:53,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:44:53,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:44:53,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:44:53,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:44:53,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:44:53,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (1/1) ... [2021-10-28 09:44:53,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:44:53,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:53,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:44:53,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:44:53,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:44:53,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:44:53,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:44:53,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:44:54,002 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:44:54,002 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-28 09:44:54,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:44:54 BoogieIcfgContainer [2021-10-28 09:44:54,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:44:54,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:44:54,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:44:54,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:44:54,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:44:53" (1/3) ... [2021-10-28 09:44:54,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bde37a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:44:54, skipping insertion in model container [2021-10-28 09:44:54,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:44:53" (2/3) ... [2021-10-28 09:44:54,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bde37a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:44:54, skipping insertion in model container [2021-10-28 09:44:54,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:44:54" (3/3) ... [2021-10-28 09:44:54,016 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2021-10-28 09:44:54,022 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:44:54,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:44:54,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:44:54,092 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 [2021-10-28 09:44:54,092 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:44:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2021-10-28 09:44:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 09:44:54,117 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:54,117 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:54,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times [2021-10-28 09:44:54,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:54,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248890928] [2021-10-28 09:44:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:54,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:54,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:54,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248890928] [2021-10-28 09:44:54,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248890928] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:44:54,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:44:54,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:44:54,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333651382] [2021-10-28 09:44:54,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:44:54,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:54,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:44:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:44:54,313 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 09:44:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:54,328 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-28 09:44:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:44:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2021-10-28 09:44:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:54,339 INFO L225 Difference]: With dead ends: 20 [2021-10-28 09:44:54,340 INFO L226 Difference]: Without dead ends: 8 [2021-10-28 09:44:54,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:44:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-28 09:44:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-28 09:44:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-10-28 09:44:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-28 09:44:54,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2021-10-28 09:44:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:54,378 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-28 09:44:54,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-28 09:44:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-28 09:44:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 09:44:54,379 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:54,380 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:54,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:44:54,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:54,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times [2021-10-28 09:44:54,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:54,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790180683] [2021-10-28 09:44:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:54,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:54,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:54,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790180683] [2021-10-28 09:44:54,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790180683] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:44:54,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:44:54,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:44:54,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264883563] [2021-10-28 09:44:54,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:44:54,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:54,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:44:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:44:54,480 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-28 09:44:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:54,504 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-28 09:44:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:44:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2021-10-28 09:44:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:54,505 INFO L225 Difference]: With dead ends: 13 [2021-10-28 09:44:54,506 INFO L226 Difference]: Without dead ends: 9 [2021-10-28 09:44:54,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:44:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-28 09:44:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-28 09:44:54,509 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) [2021-10-28 09:44:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-28 09:44:54,510 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-28 09:44:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:54,511 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-28 09:44:54,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-28 09:44:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-28 09:44:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:44:54,512 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:54,512 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:54,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:44:54,513 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash 183170323, now seen corresponding path program 1 times [2021-10-28 09:44:54,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:54,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182068639] [2021-10-28 09:44:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:54,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:54,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:54,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182068639] [2021-10-28 09:44:54,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182068639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:54,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850807351] [2021-10-28 09:44:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:54,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:54,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:54,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:54,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:44:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:44:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:54,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850807351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:54,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:54,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-28 09:44:54,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179049886] [2021-10-28 09:44:54,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:44:54,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:54,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:44:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:44:54,818 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-10-28 09:44:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:54,842 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-28 09:44:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:44:54,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 [2021-10-28 09:44:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:54,844 INFO L225 Difference]: With dead ends: 14 [2021-10-28 09:44:54,844 INFO L226 Difference]: Without dead ends: 10 [2021-10-28 09:44:54,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:44:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-28 09:44:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-28 09:44:54,849 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) [2021-10-28 09:44:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-28 09:44:54,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-10-28 09:44:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:54,852 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-28 09:44:54,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-10-28 09:44:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-28 09:44:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 09:44:54,854 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:54,854 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:54,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:55,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-28 09:44:55,077 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:55,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1384978123, now seen corresponding path program 2 times [2021-10-28 09:44:55,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:55,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532681917] [2021-10-28 09:44:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:55,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:55,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:55,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532681917] [2021-10-28 09:44:55,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532681917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:55,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411836833] [2021-10-28 09:44:55,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:44:55,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:55,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:55,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:55,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:44:55,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:44:55,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:55,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:44:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:55,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411836833] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:55,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:55,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-28 09:44:55,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225713027] [2021-10-28 09:44:55,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:44:55,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:55,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:44:55,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:44:55,377 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-10-28 09:44:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:55,401 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-28 09:44:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:44:55,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 [2021-10-28 09:44:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:55,403 INFO L225 Difference]: With dead ends: 15 [2021-10-28 09:44:55,403 INFO L226 Difference]: Without dead ends: 11 [2021-10-28 09:44:55,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:44:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-28 09:44:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-28 09:44:55,409 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) [2021-10-28 09:44:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-28 09:44:55,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-10-28 09:44:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:55,411 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-28 09:44:55,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-10-28 09:44:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-28 09:44:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:44:55,414 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:55,414 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:55,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:55,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:55,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:55,638 INFO L85 PathProgramCache]: Analyzing trace with hash -13685741, now seen corresponding path program 3 times [2021-10-28 09:44:55,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:55,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782586951] [2021-10-28 09:44:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:55,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:55,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:55,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782586951] [2021-10-28 09:44:55,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782586951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:55,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482491790] [2021-10-28 09:44:55,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:44:55,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:55,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:55,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:55,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:44:55,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:44:55,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:44:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:55,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482491790] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:55,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:55,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-28 09:44:55,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013216765] [2021-10-28 09:44:55,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:44:55,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:44:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:44:55,916 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-10-28 09:44:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:55,940 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-28 09:44:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:44:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 [2021-10-28 09:44:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:55,944 INFO L225 Difference]: With dead ends: 16 [2021-10-28 09:44:55,944 INFO L226 Difference]: Without dead ends: 12 [2021-10-28 09:44:55,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:44:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-28 09:44:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-28 09:44:55,962 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) [2021-10-28 09:44:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-28 09:44:55,963 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2021-10-28 09:44:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:55,964 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-28 09:44:55,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-10-28 09:44:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-28 09:44:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:44:55,966 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:55,966 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:56,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:56,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:56,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:56,182 INFO L85 PathProgramCache]: Analyzing trace with hash -422592565, now seen corresponding path program 4 times [2021-10-28 09:44:56,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:56,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093745481] [2021-10-28 09:44:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:56,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:56,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:56,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093745481] [2021-10-28 09:44:56,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093745481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:56,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016494377] [2021-10-28 09:44:56,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:44:56,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:56,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:56,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:56,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:44:56,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:44:56,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:44:56,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:56,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016494377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:56,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:56,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-10-28 09:44:56,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565123580] [2021-10-28 09:44:56,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:44:56,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:56,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:44:56,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:44:56,377 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2021-10-28 09:44:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:56,394 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-28 09:44:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:44:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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 [2021-10-28 09:44:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:56,396 INFO L225 Difference]: With dead ends: 17 [2021-10-28 09:44:56,396 INFO L226 Difference]: Without dead ends: 13 [2021-10-28 09:44:56,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:44:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-28 09:44:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 09:44:56,400 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) [2021-10-28 09:44:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-28 09:44:56,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-10-28 09:44:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:56,401 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-28 09:44:56,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2021-10-28 09:44:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-28 09:44:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:44:56,402 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:56,403 INFO L513 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:56,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:56,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 09:44:56,620 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash -213802221, now seen corresponding path program 5 times [2021-10-28 09:44:56,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:56,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251153892] [2021-10-28 09:44:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:56,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:56,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:56,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251153892] [2021-10-28 09:44:56,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251153892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:56,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195119533] [2021-10-28 09:44:56,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:44:56,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:56,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:56,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:56,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:44:56,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:44:56,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:56,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:44:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195119533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:56,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:56,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-10-28 09:44:56,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591593812] [2021-10-28 09:44:56,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:44:56,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:44:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:44:56,926 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-10-28 09:44:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:56,942 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-28 09:44:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:44:56,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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 [2021-10-28 09:44:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:56,943 INFO L225 Difference]: With dead ends: 18 [2021-10-28 09:44:56,944 INFO L226 Difference]: Without dead ends: 14 [2021-10-28 09:44:56,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:44:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-28 09:44:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-28 09:44:56,947 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) [2021-10-28 09:44:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-28 09:44:56,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-10-28 09:44:56,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:56,948 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-28 09:44:56,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-10-28 09:44:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-28 09:44:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:44:56,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:56,949 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:56,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:57,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:57,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:57,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1963731147, now seen corresponding path program 6 times [2021-10-28 09:44:57,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:57,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367876780] [2021-10-28 09:44:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:57,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:57,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:57,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367876780] [2021-10-28 09:44:57,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367876780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:57,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755761056] [2021-10-28 09:44:57,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:44:57,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:57,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:57,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:57,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:44:57,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-28 09:44:57,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:44:57,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:57,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755761056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:57,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:57,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-28 09:44:57,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633365260] [2021-10-28 09:44:57,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:44:57,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:44:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:44:57,466 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2021-10-28 09:44:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:57,500 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-10-28 09:44:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:44:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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 [2021-10-28 09:44:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:57,502 INFO L225 Difference]: With dead ends: 19 [2021-10-28 09:44:57,502 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 09:44:57,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:44:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 09:44:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 09:44:57,507 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) [2021-10-28 09:44:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-28 09:44:57,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-10-28 09:44:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:57,508 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-28 09:44:57,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2021-10-28 09:44:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-28 09:44:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:44:57,510 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:57,510 INFO L513 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:57,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:57,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:57,730 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash 747788819, now seen corresponding path program 7 times [2021-10-28 09:44:57,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:57,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375637212] [2021-10-28 09:44:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:57,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:57,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:57,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375637212] [2021-10-28 09:44:57,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375637212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:57,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840291599] [2021-10-28 09:44:57,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:44:57,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:57,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:57,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:57,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:44:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:44:57,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:57,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840291599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:57,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:57,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-10-28 09:44:57,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734786626] [2021-10-28 09:44:57,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:44:57,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:44:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:44:57,989 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.4) 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) [2021-10-28 09:44:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:58,006 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-10-28 09:44:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:44:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) 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) Word has length 14 [2021-10-28 09:44:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:58,008 INFO L225 Difference]: With dead ends: 20 [2021-10-28 09:44:58,008 INFO L226 Difference]: Without dead ends: 16 [2021-10-28 09:44:58,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:44:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-28 09:44:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-28 09:44:58,011 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) [2021-10-28 09:44:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-28 09:44:58,012 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-10-28 09:44:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-28 09:44:58,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) 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) [2021-10-28 09:44:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-28 09:44:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:44:58,014 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:58,014 INFO L513 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:58,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:58,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:58,233 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1708282315, now seen corresponding path program 8 times [2021-10-28 09:44:58,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:58,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076585126] [2021-10-28 09:44:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:58,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:58,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:58,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076585126] [2021-10-28 09:44:58,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076585126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:58,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358953209] [2021-10-28 09:44:58,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:44:58,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:58,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:58,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:58,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:44:58,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:44:58,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:58,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:44:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:58,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358953209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:58,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:58,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-10-28 09:44:58,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762031111] [2021-10-28 09:44:58,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:44:58,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:44:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:44:58,516 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-10-28 09:44:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:58,539 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-10-28 09:44:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:44:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 [2021-10-28 09:44:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:58,541 INFO L225 Difference]: With dead ends: 21 [2021-10-28 09:44:58,541 INFO L226 Difference]: Without dead ends: 17 [2021-10-28 09:44:58,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:44:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-28 09:44:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-28 09:44:58,547 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) [2021-10-28 09:44:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-28 09:44:58,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-10-28 09:44:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:58,548 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-28 09:44:58,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-10-28 09:44:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-28 09:44:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:44:58,550 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:58,550 INFO L513 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:58,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:58,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 09:44:58,757 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1418809619, now seen corresponding path program 9 times [2021-10-28 09:44:58,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:58,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846334218] [2021-10-28 09:44:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:58,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:58,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:58,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846334218] [2021-10-28 09:44:58,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846334218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:58,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644653533] [2021-10-28 09:44:58,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:44:58,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:58,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:58,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:58,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:44:58,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:44:58,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:58,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:44:58,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:59,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644653533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:59,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:59,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-10-28 09:44:59,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925362852] [2021-10-28 09:44:59,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:44:59,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:44:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:44:59,032 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2021-10-28 09:44:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:59,055 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-28 09:44:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:44:59,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 [2021-10-28 09:44:59,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:59,057 INFO L225 Difference]: With dead ends: 22 [2021-10-28 09:44:59,057 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 09:44:59,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:44:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 09:44:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-28 09:44:59,060 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) [2021-10-28 09:44:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-10-28 09:44:59,061 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-10-28 09:44:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:59,062 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-10-28 09:44:59,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2021-10-28 09:44:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-10-28 09:44:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:44:59,063 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:59,063 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:59,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:59,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:59,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:59,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1035090635, now seen corresponding path program 10 times [2021-10-28 09:44:59,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:59,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316979736] [2021-10-28 09:44:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:59,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:59,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:59,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316979736] [2021-10-28 09:44:59,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316979736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:59,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717897547] [2021-10-28 09:44:59,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:44:59,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:59,396 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:59,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:44:59,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:44:59,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:44:59,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:44:59,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:44:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:59,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717897547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:59,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:44:59,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-10-28 09:44:59,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977873233] [2021-10-28 09:44:59,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:44:59,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:44:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:44:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:44:59,562 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:44:59,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:44:59,588 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-10-28 09:44:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:44:59,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-28 09:44:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:44:59,589 INFO L225 Difference]: With dead ends: 23 [2021-10-28 09:44:59,590 INFO L226 Difference]: Without dead ends: 19 [2021-10-28 09:44:59,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:44:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-28 09:44:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-28 09:44:59,593 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) [2021-10-28 09:44:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-28 09:44:59,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-10-28 09:44:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:44:59,595 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-28 09:44:59,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:44:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-28 09:44:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:44:59,596 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:44:59,596 INFO L513 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:44:59,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:44:59,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:44:59,809 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:44:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:44:59,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2024704019, now seen corresponding path program 11 times [2021-10-28 09:44:59,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:44:59,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359679727] [2021-10-28 09:44:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:44:59,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:44:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:44:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:44:59,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:44:59,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359679727] [2021-10-28 09:44:59,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359679727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:44:59,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958225292] [2021-10-28 09:44:59,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:44:59,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:44:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:44:59,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:44:59,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:45:00,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-28 09:45:00,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:00,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:45:00,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:00,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958225292] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:00,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:00,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-10-28 09:45:00,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015985224] [2021-10-28 09:45:00,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:45:00,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:00,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:45:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:45:00,169 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-10-28 09:45:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:00,198 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-10-28 09:45:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:45:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 [2021-10-28 09:45:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:00,201 INFO L225 Difference]: With dead ends: 24 [2021-10-28 09:45:00,201 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 09:45:00,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:45:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 09:45:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-28 09:45:00,211 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) [2021-10-28 09:45:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-28 09:45:00,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-10-28 09:45:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:00,212 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-28 09:45:00,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-10-28 09:45:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-28 09:45:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:45:00,213 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:00,213 INFO L513 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:00,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:00,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:45:00,421 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:00,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1657019445, now seen corresponding path program 12 times [2021-10-28 09:45:00,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:00,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920913641] [2021-10-28 09:45:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:00,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:00,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:00,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920913641] [2021-10-28 09:45:00,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920913641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:00,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585865332] [2021-10-28 09:45:00,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:00,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:00,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:00,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:00,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:45:00,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 09:45:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:45:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:00,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585865332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:00,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:00,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-10-28 09:45:00,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54218947] [2021-10-28 09:45:00,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:45:00,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:45:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:45:00,801 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:00,841 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-10-28 09:45:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:45:00,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 09:45:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:00,845 INFO L225 Difference]: With dead ends: 25 [2021-10-28 09:45:00,845 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 09:45:00,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:45:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 09:45:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 09:45:00,851 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) [2021-10-28 09:45:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-10-28 09:45:00,852 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-10-28 09:45:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:00,852 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-10-28 09:45:00,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:45:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-10-28 09:45:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:45:00,853 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:00,853 INFO L513 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:00,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:01,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:45:01,076 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 173670163, now seen corresponding path program 13 times [2021-10-28 09:45:01,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:01,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144313543] [2021-10-28 09:45:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:01,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:01,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:01,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144313543] [2021-10-28 09:45:01,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144313543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:01,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536842270] [2021-10-28 09:45:01,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:01,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:01,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:01,252 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:01,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:45:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:45:01,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:01,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536842270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:01,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:01,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-10-28 09:45:01,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121857248] [2021-10-28 09:45:01,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:45:01,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:45:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:45:01,463 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-10-28 09:45:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:01,486 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-10-28 09:45:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:45:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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 [2021-10-28 09:45:01,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:01,488 INFO L225 Difference]: With dead ends: 26 [2021-10-28 09:45:01,488 INFO L226 Difference]: Without dead ends: 22 [2021-10-28 09:45:01,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:45:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-28 09:45:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-28 09:45:01,494 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) [2021-10-28 09:45:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-10-28 09:45:01,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-10-28 09:45:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:01,499 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-10-28 09:45:01,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-10-28 09:45:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-10-28 09:45:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:45:01,500 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:01,501 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:01,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:01,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:45:01,725 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1090473163, now seen corresponding path program 14 times [2021-10-28 09:45:01,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:01,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452509670] [2021-10-28 09:45:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:01,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:01,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:01,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452509670] [2021-10-28 09:45:01,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452509670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:01,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709791688] [2021-10-28 09:45:01,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:01,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:01,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:01,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:01,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:45:02,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:02,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:02,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:45:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:02,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709791688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:02,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:02,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-10-28 09:45:02,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76952128] [2021-10-28 09:45:02,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 09:45:02,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 09:45:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:45:02,106 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-10-28 09:45:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:02,141 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-10-28 09:45:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:45:02,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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 [2021-10-28 09:45:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:02,142 INFO L225 Difference]: With dead ends: 27 [2021-10-28 09:45:02,142 INFO L226 Difference]: Without dead ends: 23 [2021-10-28 09:45:02,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:45:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-28 09:45:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-28 09:45:02,146 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) [2021-10-28 09:45:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-28 09:45:02,147 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-10-28 09:45:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:02,148 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-28 09:45:02,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-10-28 09:45:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-28 09:45:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:45:02,151 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:02,151 INFO L513 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:02,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:02,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:45:02,365 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash -553404909, now seen corresponding path program 15 times [2021-10-28 09:45:02,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:02,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417980997] [2021-10-28 09:45:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:02,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:02,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:02,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417980997] [2021-10-28 09:45:02,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417980997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:02,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172160695] [2021-10-28 09:45:02,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:02,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:02,554 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:02,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:45:02,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-28 09:45:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:45:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:02,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172160695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:02,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:02,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-28 09:45:02,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476704320] [2021-10-28 09:45:02,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:45:02,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:02,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:45:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:45:02,835 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2021-10-28 09:45:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:02,863 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-10-28 09:45:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:45:02,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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 [2021-10-28 09:45:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:02,865 INFO L225 Difference]: With dead ends: 28 [2021-10-28 09:45:02,865 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 09:45:02,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:45:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 09:45:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 09:45:02,869 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) [2021-10-28 09:45:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-10-28 09:45:02,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-10-28 09:45:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:02,870 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-10-28 09:45:02,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2021-10-28 09:45:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-10-28 09:45:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:45:02,871 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:02,871 INFO L513 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:02,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:03,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:03,097 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash 25982411, now seen corresponding path program 16 times [2021-10-28 09:45:03,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:03,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233867236] [2021-10-28 09:45:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:03,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:03,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:03,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233867236] [2021-10-28 09:45:03,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233867236] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:03,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397721149] [2021-10-28 09:45:03,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:03,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:03,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:03,325 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:03,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:45:03,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:03,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:45:03,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:03,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397721149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:03,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:03,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-10-28 09:45:03,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757220755] [2021-10-28 09:45:03,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:45:03,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:45:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:45:03,578 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-10-28 09:45:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:03,604 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-10-28 09:45:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:45:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 [2021-10-28 09:45:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:03,606 INFO L225 Difference]: With dead ends: 29 [2021-10-28 09:45:03,606 INFO L226 Difference]: Without dead ends: 25 [2021-10-28 09:45:03,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:45:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-28 09:45:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-28 09:45:03,613 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) [2021-10-28 09:45:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-10-28 09:45:03,613 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-10-28 09:45:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:03,614 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-10-28 09:45:03,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-10-28 09:45:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-10-28 09:45:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:45:03,614 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:03,615 INFO L513 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:03,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:03,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:45:03,815 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash 807120147, now seen corresponding path program 17 times [2021-10-28 09:45:03,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:03,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297882039] [2021-10-28 09:45:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:03,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:04,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:04,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297882039] [2021-10-28 09:45:04,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297882039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:04,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604390297] [2021-10-28 09:45:04,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:04,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:04,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:04,094 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:04,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:45:04,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-28 09:45:04,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:45:04,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:04,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604390297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:04,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:04,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-10-28 09:45:04,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118311704] [2021-10-28 09:45:04,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:45:04,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:04,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:45:04,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:45:04,315 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-10-28 09:45:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:04,352 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-10-28 09:45:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:45:04,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 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 [2021-10-28 09:45:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:04,353 INFO L225 Difference]: With dead ends: 30 [2021-10-28 09:45:04,353 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 09:45:04,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:45:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 09:45:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-28 09:45:04,357 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) [2021-10-28 09:45:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-28 09:45:04,357 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-10-28 09:45:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:04,358 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-28 09:45:04,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-10-28 09:45:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-28 09:45:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 09:45:04,359 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:04,359 INFO L513 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:04,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:04,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:04,578 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:04,579 INFO L85 PathProgramCache]: Analyzing trace with hash -747413813, now seen corresponding path program 18 times [2021-10-28 09:45:04,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:04,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188061211] [2021-10-28 09:45:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:04,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:04,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:04,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188061211] [2021-10-28 09:45:04,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188061211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:04,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685560062] [2021-10-28 09:45:04,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:04,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:04,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:04,829 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:04,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:45:04,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-28 09:45:04,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:45:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:05,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685560062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:05,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:05,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-10-28 09:45:05,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531109943] [2021-10-28 09:45:05,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:45:05,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:45:05,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:45:05,115 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2021-10-28 09:45:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:05,146 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-10-28 09:45:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:45:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 [2021-10-28 09:45:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:05,148 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:45:05,148 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 09:45:05,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:45:05,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 09:45:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 09:45:05,152 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) [2021-10-28 09:45:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-10-28 09:45:05,152 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-10-28 09:45:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:05,153 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-10-28 09:45:05,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2021-10-28 09:45:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-10-28 09:45:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:45:05,154 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:05,154 INFO L513 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:05,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:05,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:05,381 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:05,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1693326317, now seen corresponding path program 19 times [2021-10-28 09:45:05,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:05,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943123240] [2021-10-28 09:45:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:05,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:05,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:05,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943123240] [2021-10-28 09:45:05,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943123240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:05,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436266181] [2021-10-28 09:45:05,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:05,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:05,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:05,677 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:05,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:45:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:45:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:05,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436266181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:05,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:05,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-10-28 09:45:05,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945231514] [2021-10-28 09:45:05,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 09:45:05,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:05,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:45:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:45:05,908 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2021-10-28 09:45:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:05,939 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-10-28 09:45:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:45:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 [2021-10-28 09:45:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:05,941 INFO L225 Difference]: With dead ends: 32 [2021-10-28 09:45:05,941 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 09:45:05,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:45:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 09:45:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 09:45:05,945 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) [2021-10-28 09:45:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-10-28 09:45:05,945 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-10-28 09:45:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:05,946 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-10-28 09:45:05,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2021-10-28 09:45:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-10-28 09:45:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 09:45:05,947 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:05,947 INFO L513 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:05,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:06,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 09:45:06,165 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash -951842869, now seen corresponding path program 20 times [2021-10-28 09:45:06,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:06,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090651559] [2021-10-28 09:45:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:06,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:06,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:06,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090651559] [2021-10-28 09:45:06,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090651559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:06,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458530937] [2021-10-28 09:45:06,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:06,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:06,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:06,463 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:06,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:45:06,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:06,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 09:45:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:06,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458530937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:06,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:06,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-10-28 09:45:06,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912010195] [2021-10-28 09:45:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:45:06,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:45:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:45:06,779 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-10-28 09:45:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:06,807 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-10-28 09:45:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:45:06,807 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 [2021-10-28 09:45:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:06,808 INFO L225 Difference]: With dead ends: 33 [2021-10-28 09:45:06,808 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 09:45:06,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:45:06,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 09:45:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-28 09:45:06,812 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) [2021-10-28 09:45:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-10-28 09:45:06,813 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-10-28 09:45:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:06,813 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-10-28 09:45:06,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-10-28 09:45:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-10-28 09:45:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:45:06,814 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:06,814 INFO L513 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:06,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:07,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 09:45:07,029 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash 559307539, now seen corresponding path program 21 times [2021-10-28 09:45:07,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:07,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841256351] [2021-10-28 09:45:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:07,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:07,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:07,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841256351] [2021-10-28 09:45:07,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841256351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:07,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351602815] [2021-10-28 09:45:07,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:07,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:07,311 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:07,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:45:07,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-28 09:45:07,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 09:45:07,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:07,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351602815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:07,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:07,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-28 09:45:07,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246895484] [2021-10-28 09:45:07,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:45:07,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:45:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:45:07,591 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2021-10-28 09:45:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:07,620 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-10-28 09:45:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:45:07,621 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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 [2021-10-28 09:45:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:07,621 INFO L225 Difference]: With dead ends: 34 [2021-10-28 09:45:07,621 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 09:45:07,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:45:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 09:45:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 09:45:07,624 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) [2021-10-28 09:45:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-10-28 09:45:07,625 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-10-28 09:45:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:07,625 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-10-28 09:45:07,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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) [2021-10-28 09:45:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-10-28 09:45:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:45:07,626 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:07,626 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:07,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:07,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:07,841 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash 160329931, now seen corresponding path program 22 times [2021-10-28 09:45:07,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:07,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269545164] [2021-10-28 09:45:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:07,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:08,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:08,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269545164] [2021-10-28 09:45:08,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269545164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:08,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815030104] [2021-10-28 09:45:08,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:08,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:08,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:08,142 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:08,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:45:08,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:08,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:45:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:08,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815030104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:08,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:08,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-10-28 09:45:08,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416696900] [2021-10-28 09:45:08,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 09:45:08,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 09:45:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:45:08,435 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2021-10-28 09:45:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:08,465 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-10-28 09:45:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 09:45:08,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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 [2021-10-28 09:45:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:08,467 INFO L225 Difference]: With dead ends: 35 [2021-10-28 09:45:08,467 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 09:45:08,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:45:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 09:45:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-28 09:45:08,471 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) [2021-10-28 09:45:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-10-28 09:45:08,472 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-10-28 09:45:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:08,472 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-10-28 09:45:08,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2021-10-28 09:45:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-10-28 09:45:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 09:45:08,473 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:08,473 INFO L513 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:08,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:08,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:08,694 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:08,695 INFO L85 PathProgramCache]: Analyzing trace with hash 676925971, now seen corresponding path program 23 times [2021-10-28 09:45:08,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:08,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040025287] [2021-10-28 09:45:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:08,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:09,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:09,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040025287] [2021-10-28 09:45:09,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040025287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:09,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354024085] [2021-10-28 09:45:09,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:09,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:09,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:09,030 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:09,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:45:09,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-28 09:45:09,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:09,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 09:45:09,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:09,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354024085] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:09,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:09,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-10-28 09:45:09,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098913933] [2021-10-28 09:45:09,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:45:09,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:09,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:45:09,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:45:09,362 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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) [2021-10-28 09:45:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:09,395 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-10-28 09:45:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:45:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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 [2021-10-28 09:45:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:09,396 INFO L225 Difference]: With dead ends: 36 [2021-10-28 09:45:09,397 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 09:45:09,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:45:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 09:45:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-28 09:45:09,401 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) [2021-10-28 09:45:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-28 09:45:09,401 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-10-28 09:45:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:09,402 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-28 09:45:09,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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) [2021-10-28 09:45:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-28 09:45:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:45:09,403 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:09,403 INFO L513 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:09,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:09,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:45:09,617 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:09,617 INFO L85 PathProgramCache]: Analyzing trace with hash -488465973, now seen corresponding path program 24 times [2021-10-28 09:45:09,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:09,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707106496] [2021-10-28 09:45:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:09,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:09,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:09,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707106496] [2021-10-28 09:45:09,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707106496] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:09,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679435635] [2021-10-28 09:45:09,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:09,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:09,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:09,998 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:09,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:45:10,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 09:45:10,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:45:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:10,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679435635] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:10,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:10,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-10-28 09:45:10,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872034478] [2021-10-28 09:45:10,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:45:10,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:45:10,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:45:10,322 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-10-28 09:45:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:10,358 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-10-28 09:45:10,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 09:45:10,359 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 [2021-10-28 09:45:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:10,359 INFO L225 Difference]: With dead ends: 37 [2021-10-28 09:45:10,359 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 09:45:10,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:45:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 09:45:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-28 09:45:10,379 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) [2021-10-28 09:45:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-10-28 09:45:10,380 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-10-28 09:45:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:10,380 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-10-28 09:45:10,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-10-28 09:45:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-10-28 09:45:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 09:45:10,382 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:10,382 INFO L513 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:10,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-28 09:45:10,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:10,605 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2039089427, now seen corresponding path program 25 times [2021-10-28 09:45:10,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:10,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140631194] [2021-10-28 09:45:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:10,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:11,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:11,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140631194] [2021-10-28 09:45:11,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140631194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:11,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102736290] [2021-10-28 09:45:11,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:11,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:11,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:11,045 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:11,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:45:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:11,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 09:45:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:11,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102736290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:11,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:11,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-10-28 09:45:11,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896117525] [2021-10-28 09:45:11,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:45:11,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:11,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:45:11,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:45:11,384 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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) [2021-10-28 09:45:11,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:11,419 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-10-28 09:45:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:45:11,420 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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 [2021-10-28 09:45:11,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:11,420 INFO L225 Difference]: With dead ends: 38 [2021-10-28 09:45:11,421 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 09:45:11,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:45:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 09:45:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-28 09:45:11,424 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) [2021-10-28 09:45:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-10-28 09:45:11,425 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-10-28 09:45:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:11,425 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-10-28 09:45:11,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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) [2021-10-28 09:45:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-10-28 09:45:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 09:45:11,426 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:11,427 INFO L513 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:11,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:11,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:45:11,653 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:11,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1211071797, now seen corresponding path program 26 times [2021-10-28 09:45:11,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:11,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592038300] [2021-10-28 09:45:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:11,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:12,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:12,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592038300] [2021-10-28 09:45:12,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592038300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:12,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590578838] [2021-10-28 09:45:12,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:12,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:12,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:12,054 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:12,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:45:12,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:12,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:12,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:45:12,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:12,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590578838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:12,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:12,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-10-28 09:45:12,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163616628] [2021-10-28 09:45:12,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 09:45:12,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:12,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 09:45:12,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:45:12,430 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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) [2021-10-28 09:45:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:12,469 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-28 09:45:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 09:45:12,470 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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 [2021-10-28 09:45:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:12,471 INFO L225 Difference]: With dead ends: 39 [2021-10-28 09:45:12,471 INFO L226 Difference]: Without dead ends: 35 [2021-10-28 09:45:12,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:45:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-28 09:45:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-28 09:45:12,475 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) [2021-10-28 09:45:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-10-28 09:45:12,475 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-10-28 09:45:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:12,476 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-10-28 09:45:12,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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) [2021-10-28 09:45:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-10-28 09:45:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:45:12,487 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:12,487 INFO L513 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:12,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-28 09:45:12,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:45:12,705 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1113145363, now seen corresponding path program 27 times [2021-10-28 09:45:12,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:12,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781057660] [2021-10-28 09:45:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:12,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:13,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:13,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781057660] [2021-10-28 09:45:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781057660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:13,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18859374] [2021-10-28 09:45:13,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:13,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:13,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:13,116 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:13,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:45:13,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-28 09:45:13,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:13,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 09:45:13,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:13,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18859374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:13,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:13,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-10-28 09:45:13,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450338940] [2021-10-28 09:45:13,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 09:45:13,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:13,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 09:45:13,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:45:13,484 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 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) [2021-10-28 09:45:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:13,517 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-10-28 09:45:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:45:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 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 [2021-10-28 09:45:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:13,518 INFO L225 Difference]: With dead ends: 40 [2021-10-28 09:45:13,518 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:45:13,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:45:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:45:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 09:45:13,527 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) [2021-10-28 09:45:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-10-28 09:45:13,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-10-28 09:45:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:13,528 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-10-28 09:45:13,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 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) [2021-10-28 09:45:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-10-28 09:45:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:45:13,529 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:13,529 INFO L513 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:13,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:13,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:45:13,749 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:13,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:13,750 INFO L85 PathProgramCache]: Analyzing trace with hash 149433291, now seen corresponding path program 28 times [2021-10-28 09:45:13,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:13,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264139027] [2021-10-28 09:45:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:13,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:14,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:14,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264139027] [2021-10-28 09:45:14,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264139027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:14,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475638148] [2021-10-28 09:45:14,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:14,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:14,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:14,221 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:14,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 09:45:14,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:14,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:45:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:14,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475638148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:14,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:14,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-10-28 09:45:14,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183033043] [2021-10-28 09:45:14,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:45:14,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:45:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:45:14,640 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2021-10-28 09:45:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:14,675 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-10-28 09:45:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:45:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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 [2021-10-28 09:45:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:14,676 INFO L225 Difference]: With dead ends: 41 [2021-10-28 09:45:14,676 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 09:45:14,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:45:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 09:45:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-28 09:45:14,680 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) [2021-10-28 09:45:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-10-28 09:45:14,680 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-10-28 09:45:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:14,681 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-10-28 09:45:14,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2021-10-28 09:45:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-10-28 09:45:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 09:45:14,682 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:14,682 INFO L513 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:14,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:14,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:14,909 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash 339130131, now seen corresponding path program 29 times [2021-10-28 09:45:14,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:14,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588949462] [2021-10-28 09:45:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:14,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:15,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:15,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588949462] [2021-10-28 09:45:15,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588949462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:15,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065227203] [2021-10-28 09:45:15,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:15,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:15,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:15,455 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:15,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 09:45:15,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-28 09:45:15,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:15,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 09:45:15,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:15,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065227203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:15,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:15,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-10-28 09:45:15,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055212978] [2021-10-28 09:45:15,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:45:15,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:45:15,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:45:15,874 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 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) [2021-10-28 09:45:15,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:15,916 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-10-28 09:45:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 09:45:15,917 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 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 [2021-10-28 09:45:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:15,918 INFO L225 Difference]: With dead ends: 42 [2021-10-28 09:45:15,918 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 09:45:15,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:45:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 09:45:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-28 09:45:15,921 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) [2021-10-28 09:45:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-10-28 09:45:15,923 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-10-28 09:45:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:15,923 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-10-28 09:45:15,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 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) [2021-10-28 09:45:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-10-28 09:45:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 09:45:15,924 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:15,924 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:15,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-28 09:45:16,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 09:45:16,153 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1924764875, now seen corresponding path program 30 times [2021-10-28 09:45:16,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:16,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561709974] [2021-10-28 09:45:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:16,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:16,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:16,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561709974] [2021-10-28 09:45:16,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561709974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:16,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23817332] [2021-10-28 09:45:16,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:16,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:16,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:16,695 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:16,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 09:45:17,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-10-28 09:45:17,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:17,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 09:45:17,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:17,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23817332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:17,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:17,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-10-28 09:45:17,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525692641] [2021-10-28 09:45:17,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:45:17,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:45:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:45:17,145 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 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) [2021-10-28 09:45:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:17,185 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-10-28 09:45:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 09:45:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 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 [2021-10-28 09:45:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:17,186 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:45:17,186 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 09:45:17,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:45:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 09:45:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-28 09:45:17,193 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) [2021-10-28 09:45:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-10-28 09:45:17,194 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-10-28 09:45:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:17,194 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-10-28 09:45:17,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 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) [2021-10-28 09:45:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-10-28 09:45:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:45:17,195 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:17,196 INFO L513 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:17,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:17,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:17,409 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash -460165613, now seen corresponding path program 31 times [2021-10-28 09:45:17,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:17,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84317964] [2021-10-28 09:45:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:17,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:17,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:17,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84317964] [2021-10-28 09:45:17,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84317964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:17,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048899570] [2021-10-28 09:45:17,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:17,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:17,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:17,969 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:17,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 09:45:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:18,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 09:45:18,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:18,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048899570] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:18,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:18,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-10-28 09:45:18,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326427807] [2021-10-28 09:45:18,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 09:45:18,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 09:45:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:45:18,377 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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) [2021-10-28 09:45:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:18,426 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-10-28 09:45:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:45:18,427 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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 [2021-10-28 09:45:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:18,427 INFO L225 Difference]: With dead ends: 44 [2021-10-28 09:45:18,428 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 09:45:18,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:45:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 09:45:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 09:45:18,431 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) [2021-10-28 09:45:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-10-28 09:45:18,432 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-10-28 09:45:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:18,432 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-10-28 09:45:18,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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) [2021-10-28 09:45:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-10-28 09:45:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 09:45:18,433 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:18,433 INFO L513 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:18,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-28 09:45:18,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:18,661 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1378566709, now seen corresponding path program 32 times [2021-10-28 09:45:18,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:18,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832779432] [2021-10-28 09:45:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:18,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:19,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:19,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832779432] [2021-10-28 09:45:19,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832779432] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:19,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700989150] [2021-10-28 09:45:19,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:19,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:19,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:19,381 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:19,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 09:45:19,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:19,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:19,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 09:45:19,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:19,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700989150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:19,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:19,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-10-28 09:45:19,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949793443] [2021-10-28 09:45:19,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 09:45:19,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:19,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 09:45:19,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:45:19,841 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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) [2021-10-28 09:45:19,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:19,872 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-10-28 09:45:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 09:45:19,873 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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 [2021-10-28 09:45:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:19,873 INFO L225 Difference]: With dead ends: 45 [2021-10-28 09:45:19,873 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 09:45:19,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:45:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 09:45:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-10-28 09:45:19,875 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) [2021-10-28 09:45:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-10-28 09:45:19,876 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-10-28 09:45:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:19,876 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-10-28 09:45:19,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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) [2021-10-28 09:45:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-10-28 09:45:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:45:19,877 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:19,877 INFO L513 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:19,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:20,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:20,078 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash 215770387, now seen corresponding path program 33 times [2021-10-28 09:45:20,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:20,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778137019] [2021-10-28 09:45:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:20,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:20,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:20,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778137019] [2021-10-28 09:45:20,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778137019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:20,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367679099] [2021-10-28 09:45:20,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:20,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:20,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:20,715 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:20,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 09:45:21,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-28 09:45:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:45:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:21,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367679099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:21,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:21,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-10-28 09:45:21,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594105756] [2021-10-28 09:45:21,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 09:45:21,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 09:45:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:45:21,172 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 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) [2021-10-28 09:45:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:21,206 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-10-28 09:45:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 09:45:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 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 [2021-10-28 09:45:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:21,207 INFO L225 Difference]: With dead ends: 46 [2021-10-28 09:45:21,207 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 09:45:21,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:45:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 09:45:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 09:45:21,210 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) [2021-10-28 09:45:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-10-28 09:45:21,211 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-10-28 09:45:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:21,211 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-10-28 09:45:21,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 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) [2021-10-28 09:45:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-10-28 09:45:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 09:45:21,213 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:21,213 INFO L513 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:21,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:21,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 09:45:21,429 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1899387189, now seen corresponding path program 34 times [2021-10-28 09:45:21,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:21,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953607007] [2021-10-28 09:45:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:21,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:22,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:22,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953607007] [2021-10-28 09:45:22,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953607007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:22,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189038013] [2021-10-28 09:45:22,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:22,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:22,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:22,029 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:22,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 09:45:22,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:22,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:45:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:22,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189038013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:22,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:22,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2021-10-28 09:45:22,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062299936] [2021-10-28 09:45:22,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 09:45:22,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 09:45:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:45:22,468 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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) [2021-10-28 09:45:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:22,529 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-10-28 09:45:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 09:45:22,530 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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 [2021-10-28 09:45:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:22,536 INFO L225 Difference]: With dead ends: 47 [2021-10-28 09:45:22,536 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 09:45:22,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:45:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 09:45:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-28 09:45:22,539 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) [2021-10-28 09:45:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-10-28 09:45:22,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-10-28 09:45:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:22,541 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-10-28 09:45:22,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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) [2021-10-28 09:45:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-10-28 09:45:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 09:45:22,542 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:22,542 INFO L513 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:22,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:22,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 09:45:22,757 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1250204691, now seen corresponding path program 35 times [2021-10-28 09:45:22,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:22,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707025150] [2021-10-28 09:45:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:22,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:23,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:23,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707025150] [2021-10-28 09:45:23,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707025150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:23,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140396770] [2021-10-28 09:45:23,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:23,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:23,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:23,460 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:23,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 09:45:23,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-28 09:45:23,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 09:45:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:23,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140396770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:23,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:23,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-10-28 09:45:23,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528130640] [2021-10-28 09:45:23,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 09:45:23,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 09:45:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:45:23,946 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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) [2021-10-28 09:45:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:23,997 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-10-28 09:45:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 09:45:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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 [2021-10-28 09:45:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:23,998 INFO L225 Difference]: With dead ends: 48 [2021-10-28 09:45:23,998 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 09:45:23,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:45:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 09:45:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 09:45:24,001 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) [2021-10-28 09:45:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-10-28 09:45:24,001 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-10-28 09:45:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:24,001 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-10-28 09:45:24,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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) [2021-10-28 09:45:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-10-28 09:45:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 09:45:24,003 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:24,003 INFO L513 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:24,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:24,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 09:45:24,209 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash 103305163, now seen corresponding path program 36 times [2021-10-28 09:45:24,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:24,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936489335] [2021-10-28 09:45:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:24,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:24,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:24,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936489335] [2021-10-28 09:45:24,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936489335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:24,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49829013] [2021-10-28 09:45:24,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:24,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:24,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:24,879 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:24,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 09:45:25,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 09:45:25,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:25,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 09:45:25,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:25,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49829013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:25,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:25,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-10-28 09:45:25,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065731055] [2021-10-28 09:45:25,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 09:45:25,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:25,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 09:45:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:45:25,357 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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) [2021-10-28 09:45:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:25,418 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-10-28 09:45:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 09:45:25,419 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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 [2021-10-28 09:45:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:25,420 INFO L225 Difference]: With dead ends: 49 [2021-10-28 09:45:25,420 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 09:45:25,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:45:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 09:45:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-28 09:45:25,423 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) [2021-10-28 09:45:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-10-28 09:45:25,424 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-10-28 09:45:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:25,424 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-10-28 09:45:25,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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) [2021-10-28 09:45:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-10-28 09:45:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 09:45:25,425 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:25,425 INFO L513 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:25,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-28 09:45:25,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 09:45:25,640 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1090841837, now seen corresponding path program 37 times [2021-10-28 09:45:25,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:25,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544976773] [2021-10-28 09:45:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:25,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:26,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:26,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544976773] [2021-10-28 09:45:26,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544976773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:26,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669781363] [2021-10-28 09:45:26,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:26,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:26,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:26,451 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:26,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 09:45:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 09:45:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:26,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669781363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:26,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:26,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-10-28 09:45:26,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935612729] [2021-10-28 09:45:26,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 09:45:26,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:26,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 09:45:26,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:45:26,955 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 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) [2021-10-28 09:45:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:27,024 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-10-28 09:45:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-28 09:45:27,024 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 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 [2021-10-28 09:45:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:27,025 INFO L225 Difference]: With dead ends: 50 [2021-10-28 09:45:27,025 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 09:45:27,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:45:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 09:45:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-28 09:45:27,028 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) [2021-10-28 09:45:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-10-28 09:45:27,029 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-10-28 09:45:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:27,029 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-10-28 09:45:27,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 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) [2021-10-28 09:45:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-10-28 09:45:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 09:45:27,030 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:27,030 INFO L513 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:27,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:27,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:27,230 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:27,231 INFO L85 PathProgramCache]: Analyzing trace with hash 545306827, now seen corresponding path program 38 times [2021-10-28 09:45:27,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:27,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138064263] [2021-10-28 09:45:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:27,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:27,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:27,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138064263] [2021-10-28 09:45:27,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138064263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:27,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36303289] [2021-10-28 09:45:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:27,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:27,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:27,972 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:27,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 09:45:28,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:28,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:45:28,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:28,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36303289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:28,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:28,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2021-10-28 09:45:28,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732867762] [2021-10-28 09:45:28,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 09:45:28,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:28,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 09:45:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:45:28,483 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2021-10-28 09:45:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:28,535 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-10-28 09:45:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 09:45:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 [2021-10-28 09:45:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:28,536 INFO L225 Difference]: With dead ends: 51 [2021-10-28 09:45:28,536 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 09:45:28,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:45:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 09:45:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-28 09:45:28,539 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) [2021-10-28 09:45:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-10-28 09:45:28,540 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-10-28 09:45:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:28,540 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-10-28 09:45:28,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2021-10-28 09:45:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-10-28 09:45:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 09:45:28,542 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:28,542 INFO L513 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:28,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:28,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 09:45:28,755 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:28,755 INFO L85 PathProgramCache]: Analyzing trace with hash -273692141, now seen corresponding path program 39 times [2021-10-28 09:45:28,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:28,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203364801] [2021-10-28 09:45:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:28,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:29,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:29,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203364801] [2021-10-28 09:45:29,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203364801] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:29,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594474025] [2021-10-28 09:45:29,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:29,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:29,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:29,627 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:29,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 09:45:30,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-10-28 09:45:30,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:30,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 09:45:30,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594474025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:30,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:30,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2021-10-28 09:45:30,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429770538] [2021-10-28 09:45:30,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 09:45:30,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 09:45:30,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:45:30,164 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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) [2021-10-28 09:45:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:30,222 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-10-28 09:45:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 09:45:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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 [2021-10-28 09:45:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:30,223 INFO L225 Difference]: With dead ends: 52 [2021-10-28 09:45:30,223 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 09:45:30,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:45:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 09:45:30,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-28 09:45:30,226 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) [2021-10-28 09:45:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-10-28 09:45:30,227 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-10-28 09:45:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:30,228 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-10-28 09:45:30,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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) [2021-10-28 09:45:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-10-28 09:45:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 09:45:30,229 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:30,229 INFO L513 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:30,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:30,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:30,445 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash 107143627, now seen corresponding path program 40 times [2021-10-28 09:45:30,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:30,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273884813] [2021-10-28 09:45:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:30,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:31,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:31,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273884813] [2021-10-28 09:45:31,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273884813] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:31,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321911414] [2021-10-28 09:45:31,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:31,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:31,197 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:31,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 09:45:31,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:31,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:45:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:31,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321911414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:31,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:31,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2021-10-28 09:45:31,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878288230] [2021-10-28 09:45:31,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 09:45:31,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:31,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 09:45:31,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:45:31,738 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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) [2021-10-28 09:45:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:31,793 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-10-28 09:45:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 09:45:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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 [2021-10-28 09:45:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:31,794 INFO L225 Difference]: With dead ends: 53 [2021-10-28 09:45:31,794 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 09:45:31,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:45:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 09:45:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-28 09:45:31,796 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) [2021-10-28 09:45:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-10-28 09:45:31,797 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-10-28 09:45:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:31,797 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-10-28 09:45:31,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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) [2021-10-28 09:45:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-10-28 09:45:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 09:45:31,798 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:31,798 INFO L513 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:31,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-28 09:45:32,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:32,011 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash -971849453, now seen corresponding path program 41 times [2021-10-28 09:45:32,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:32,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013280546] [2021-10-28 09:45:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:32,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:32,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:32,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013280546] [2021-10-28 09:45:32,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013280546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:32,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911908274] [2021-10-28 09:45:32,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:32,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:32,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:32,997 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:33,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 09:45:33,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-10-28 09:45:33,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:33,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 09:45:33,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:33,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911908274] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:33,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:33,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-10-28 09:45:33,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791436094] [2021-10-28 09:45:33,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 09:45:33,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 09:45:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:45:33,723 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 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) [2021-10-28 09:45:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:33,759 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-10-28 09:45:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 09:45:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 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 [2021-10-28 09:45:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:33,760 INFO L225 Difference]: With dead ends: 54 [2021-10-28 09:45:33,760 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 09:45:33,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:45:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 09:45:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-28 09:45:33,763 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) [2021-10-28 09:45:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-10-28 09:45:33,763 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-10-28 09:45:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:33,764 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-10-28 09:45:33,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 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) [2021-10-28 09:45:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-10-28 09:45:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 09:45:33,765 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:33,765 INFO L513 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:33,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:33,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:33,981 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:33,982 INFO L85 PathProgramCache]: Analyzing trace with hash -60896565, now seen corresponding path program 42 times [2021-10-28 09:45:33,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:33,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239926699] [2021-10-28 09:45:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:33,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:35,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:35,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239926699] [2021-10-28 09:45:35,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239926699] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:35,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355836156] [2021-10-28 09:45:35,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:35,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:35,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:35,049 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:35,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-28 09:45:35,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-10-28 09:45:35,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:45:35,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:35,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355836156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:35,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:35,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2021-10-28 09:45:35,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044404215] [2021-10-28 09:45:35,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 09:45:35,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:35,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 09:45:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:45:35,740 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 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) [2021-10-28 09:45:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:35,789 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-10-28 09:45:35,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-28 09:45:35,790 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 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 [2021-10-28 09:45:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:35,791 INFO L225 Difference]: With dead ends: 55 [2021-10-28 09:45:35,791 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:45:35,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:45:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:45:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-28 09:45:35,798 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) [2021-10-28 09:45:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-10-28 09:45:35,798 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-10-28 09:45:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:35,799 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-10-28 09:45:35,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 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) [2021-10-28 09:45:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-10-28 09:45:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 09:45:35,800 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:35,800 INFO L513 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:35,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:36,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-28 09:45:36,021 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1886128109, now seen corresponding path program 43 times [2021-10-28 09:45:36,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:36,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633384170] [2021-10-28 09:45:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:36,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:36,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:36,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633384170] [2021-10-28 09:45:36,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633384170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:36,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083779858] [2021-10-28 09:45:36,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:36,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:36,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:36,969 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:36,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-28 09:45:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 09:45:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:37,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083779858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:37,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:37,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-10-28 09:45:37,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781235002] [2021-10-28 09:45:37,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 09:45:37,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:37,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 09:45:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 09:45:37,583 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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) [2021-10-28 09:45:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:37,641 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-10-28 09:45:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-28 09:45:37,642 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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 [2021-10-28 09:45:37,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:37,643 INFO L225 Difference]: With dead ends: 56 [2021-10-28 09:45:37,643 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 09:45:37,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 09:45:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 09:45:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-28 09:45:37,647 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) [2021-10-28 09:45:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-10-28 09:45:37,648 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-10-28 09:45:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:37,648 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-10-28 09:45:37,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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) [2021-10-28 09:45:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-10-28 09:45:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 09:45:37,649 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:37,649 INFO L513 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:37,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:37,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-28 09:45:37,877 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1661236171, now seen corresponding path program 44 times [2021-10-28 09:45:37,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:37,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155593360] [2021-10-28 09:45:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:37,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:38,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:38,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155593360] [2021-10-28 09:45:38,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155593360] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:38,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980680566] [2021-10-28 09:45:38,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:38,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:38,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:38,933 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:38,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-28 09:45:39,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:39,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 09:45:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:39,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980680566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:39,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:39,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2021-10-28 09:45:39,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605583765] [2021-10-28 09:45:39,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-28 09:45:39,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-28 09:45:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:45:39,835 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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) [2021-10-28 09:45:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:39,884 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-10-28 09:45:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-28 09:45:39,884 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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 [2021-10-28 09:45:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:39,885 INFO L225 Difference]: With dead ends: 57 [2021-10-28 09:45:39,885 INFO L226 Difference]: Without dead ends: 53 [2021-10-28 09:45:39,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:45:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-28 09:45:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-28 09:45:39,888 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) [2021-10-28 09:45:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-10-28 09:45:39,889 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-10-28 09:45:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:39,889 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-10-28 09:45:39,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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) [2021-10-28 09:45:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-10-28 09:45:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 09:45:39,891 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:39,891 INFO L513 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:39,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:40,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:40,113 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -39620845, now seen corresponding path program 45 times [2021-10-28 09:45:40,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:40,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987422407] [2021-10-28 09:45:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:40,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:40,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:40,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987422407] [2021-10-28 09:45:40,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987422407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:40,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694106914] [2021-10-28 09:45:40,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:40,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:40,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:40,990 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:40,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-28 09:45:41,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-10-28 09:45:41,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:41,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 09:45:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:41,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694106914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:41,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:41,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-10-28 09:45:41,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950089880] [2021-10-28 09:45:41,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 09:45:41,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 09:45:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:45:41,651 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 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) [2021-10-28 09:45:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:41,699 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-10-28 09:45:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 09:45:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 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 [2021-10-28 09:45:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:41,701 INFO L225 Difference]: With dead ends: 58 [2021-10-28 09:45:41,701 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 09:45:41,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:45:41,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 09:45:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 09:45:41,704 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) [2021-10-28 09:45:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-10-28 09:45:41,705 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-10-28 09:45:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:41,705 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-10-28 09:45:41,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 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) [2021-10-28 09:45:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-10-28 09:45:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 09:45:41,706 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:41,707 INFO L513 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:41,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-28 09:45:41,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-28 09:45:41,913 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1226580789, now seen corresponding path program 46 times [2021-10-28 09:45:41,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:41,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371964984] [2021-10-28 09:45:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:41,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:43,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:43,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371964984] [2021-10-28 09:45:43,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371964984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:43,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264742777] [2021-10-28 09:45:43,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:43,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:43,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:43,018 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:43,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-28 09:45:43,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:43,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 09:45:43,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:43,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264742777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:43,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:43,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2021-10-28 09:45:43,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728473159] [2021-10-28 09:45:43,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 09:45:43,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 09:45:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 09:45:43,741 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 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) [2021-10-28 09:45:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:43,790 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-10-28 09:45:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-28 09:45:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 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 [2021-10-28 09:45:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:43,791 INFO L225 Difference]: With dead ends: 59 [2021-10-28 09:45:43,791 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 09:45:43,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 09:45:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 09:45:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-28 09:45:43,794 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) [2021-10-28 09:45:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-10-28 09:45:43,794 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-10-28 09:45:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:43,795 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-10-28 09:45:43,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 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) [2021-10-28 09:45:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-10-28 09:45:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 09:45:43,796 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:43,796 INFO L513 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:43,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:44,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:44,001 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:44,001 INFO L85 PathProgramCache]: Analyzing trace with hash 632366611, now seen corresponding path program 47 times [2021-10-28 09:45:44,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:44,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200228029] [2021-10-28 09:45:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:44,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:44,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:44,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200228029] [2021-10-28 09:45:44,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200228029] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:44,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858465266] [2021-10-28 09:45:44,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:44,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:44,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:44,963 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:44,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-28 09:45:45,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-10-28 09:45:45,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 09:45:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:45,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858465266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:45,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:45,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-10-28 09:45:45,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518811467] [2021-10-28 09:45:45,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 09:45:45,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:45,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 09:45:45,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:45:45,684 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 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) [2021-10-28 09:45:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:45,735 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-10-28 09:45:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-28 09:45:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 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 [2021-10-28 09:45:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:45,737 INFO L225 Difference]: With dead ends: 60 [2021-10-28 09:45:45,737 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 09:45:45,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:45:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 09:45:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-28 09:45:45,741 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) [2021-10-28 09:45:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-10-28 09:45:45,741 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-10-28 09:45:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:45,742 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-10-28 09:45:45,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 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) [2021-10-28 09:45:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-10-28 09:45:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:45:45,743 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:45,743 INFO L513 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:45,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 09:45:45,969 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1869806133, now seen corresponding path program 48 times [2021-10-28 09:45:45,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:45,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079748247] [2021-10-28 09:45:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:45,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:46,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:46,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079748247] [2021-10-28 09:45:46,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079748247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:46,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506767541] [2021-10-28 09:45:46,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:45:46,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:46,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:46,991 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:46,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-28 09:45:47,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-28 09:45:47,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:47,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 09:45:47,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:47,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506767541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:47,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:47,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2021-10-28 09:45:47,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583350216] [2021-10-28 09:45:47,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 09:45:47,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 09:45:47,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:45:47,719 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 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) [2021-10-28 09:45:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:47,778 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-10-28 09:45:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-28 09:45:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 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 [2021-10-28 09:45:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:47,779 INFO L225 Difference]: With dead ends: 61 [2021-10-28 09:45:47,779 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 09:45:47,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:45:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 09:45:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-28 09:45:47,783 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) [2021-10-28 09:45:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-10-28 09:45:47,784 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-10-28 09:45:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:47,784 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-10-28 09:45:47,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 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) [2021-10-28 09:45:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-10-28 09:45:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 09:45:47,785 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:47,785 INFO L513 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:47,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:48,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 09:45:48,009 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2127749869, now seen corresponding path program 49 times [2021-10-28 09:45:48,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:48,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74965108] [2021-10-28 09:45:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:48,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:49,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:49,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74965108] [2021-10-28 09:45:49,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74965108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:49,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560781666] [2021-10-28 09:45:49,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:45:49,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:49,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:49,176 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:49,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-28 09:45:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 09:45:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:49,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560781666] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:49,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:49,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-10-28 09:45:49,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984103800] [2021-10-28 09:45:49,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 09:45:49,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 09:45:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:45:49,935 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 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) [2021-10-28 09:45:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:49,983 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-10-28 09:45:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-28 09:45:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 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 [2021-10-28 09:45:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:49,984 INFO L225 Difference]: With dead ends: 62 [2021-10-28 09:45:49,984 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 09:45:49,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:45:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 09:45:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-28 09:45:49,988 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) [2021-10-28 09:45:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-10-28 09:45:49,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-10-28 09:45:49,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:49,989 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-10-28 09:45:49,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 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) [2021-10-28 09:45:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-10-28 09:45:49,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 09:45:49,991 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:49,991 INFO L513 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:50,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:50,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:50,205 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1534071093, now seen corresponding path program 50 times [2021-10-28 09:45:50,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:50,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34256344] [2021-10-28 09:45:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:50,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:51,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:51,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34256344] [2021-10-28 09:45:51,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34256344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:51,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400100725] [2021-10-28 09:45:51,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:45:51,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:51,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:51,380 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:51,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-28 09:45:51,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:45:51,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:51,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 09:45:51,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:52,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400100725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:52,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:52,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2021-10-28 09:45:52,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516681555] [2021-10-28 09:45:52,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-28 09:45:52,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:52,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-28 09:45:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:45:52,153 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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) [2021-10-28 09:45:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:52,208 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-10-28 09:45:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-28 09:45:52,209 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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 [2021-10-28 09:45:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:52,210 INFO L225 Difference]: With dead ends: 63 [2021-10-28 09:45:52,210 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 09:45:52,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:45:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 09:45:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-28 09:45:52,213 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) [2021-10-28 09:45:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-10-28 09:45:52,214 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-10-28 09:45:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:52,215 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-10-28 09:45:52,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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) [2021-10-28 09:45:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-10-28 09:45:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 09:45:52,216 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:52,216 INFO L513 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:52,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-28 09:45:52,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:52,429 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash -309898221, now seen corresponding path program 51 times [2021-10-28 09:45:52,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:52,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613762109] [2021-10-28 09:45:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:52,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:53,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:53,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613762109] [2021-10-28 09:45:53,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613762109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:53,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731868119] [2021-10-28 09:45:53,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:45:53,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:53,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:53,635 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:53,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-28 09:45:54,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-10-28 09:45:54,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:54,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-28 09:45:54,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731868119] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:54,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-10-28 09:45:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64098801] [2021-10-28 09:45:54,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-28 09:45:54,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-28 09:45:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:45:54,463 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 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) [2021-10-28 09:45:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:54,545 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-10-28 09:45:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 09:45:54,546 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 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 [2021-10-28 09:45:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:54,547 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:45:54,547 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:45:54,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:45:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:45:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 09:45:54,551 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) [2021-10-28 09:45:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-10-28 09:45:54,551 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-10-28 09:45:54,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:54,552 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-10-28 09:45:54,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 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) [2021-10-28 09:45:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-10-28 09:45:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 09:45:54,553 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:54,553 INFO L513 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:54,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-28 09:45:54,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:54,769 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1015244853, now seen corresponding path program 52 times [2021-10-28 09:45:54,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:54,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85254094] [2021-10-28 09:45:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:54,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:55,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:55,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85254094] [2021-10-28 09:45:55,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85254094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:55,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443657219] [2021-10-28 09:45:55,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:45:55,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:55,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:55,872 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:55,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-28 09:45:56,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:45:56,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:56,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-28 09:45:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:56,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443657219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:56,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:56,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2021-10-28 09:45:56,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659198178] [2021-10-28 09:45:56,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 09:45:56,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 09:45:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:45:56,675 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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) [2021-10-28 09:45:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:56,736 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-10-28 09:45:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-28 09:45:56,736 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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 [2021-10-28 09:45:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:56,737 INFO L225 Difference]: With dead ends: 65 [2021-10-28 09:45:56,737 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 09:45:56,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:45:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 09:45:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-28 09:45:56,742 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) [2021-10-28 09:45:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-10-28 09:45:56,742 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-10-28 09:45:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:56,743 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-10-28 09:45:56,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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) [2021-10-28 09:45:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-10-28 09:45:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 09:45:56,744 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:56,744 INFO L513 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:56,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:56,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-28 09:45:56,961 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1406153965, now seen corresponding path program 53 times [2021-10-28 09:45:56,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:56,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71390545] [2021-10-28 09:45:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:56,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:45:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:58,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:45:58,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71390545] [2021-10-28 09:45:58,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71390545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:58,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831643699] [2021-10-28 09:45:58,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:45:58,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:58,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:45:58,301 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:45:58,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-28 09:45:58,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-10-28 09:45:58,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:45:58,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 09:45:58,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:45:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:45:59,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831643699] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:45:59,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:45:59,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-10-28 09:45:59,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879684013] [2021-10-28 09:45:59,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-28 09:45:59,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:45:59,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-28 09:45:59,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 09:45:59,159 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 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) [2021-10-28 09:45:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:45:59,219 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-10-28 09:45:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 09:45:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 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 [2021-10-28 09:45:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:45:59,220 INFO L225 Difference]: With dead ends: 66 [2021-10-28 09:45:59,220 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 09:45:59,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 09:45:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 09:45:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 09:45:59,224 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) [2021-10-28 09:45:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-10-28 09:45:59,225 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-10-28 09:45:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:45:59,225 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-10-28 09:45:59,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 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) [2021-10-28 09:45:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-10-28 09:45:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 09:45:59,226 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:45:59,226 INFO L513 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:45:59,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-28 09:45:59,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:45:59,441 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:45:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:45:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -639434549, now seen corresponding path program 54 times [2021-10-28 09:45:59,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:45:59,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123069478] [2021-10-28 09:45:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:45:59,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:45:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:00,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:00,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123069478] [2021-10-28 09:46:00,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123069478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:00,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135822334] [2021-10-28 09:46:00,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:46:00,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:00,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:00,749 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:00,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-28 09:46:01,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-10-28 09:46:01,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:01,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 09:46:01,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:01,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135822334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:01,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:01,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2021-10-28 09:46:01,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655633190] [2021-10-28 09:46:01,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-28 09:46:01,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-28 09:46:01,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-10-28 09:46:01,615 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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) [2021-10-28 09:46:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:01,697 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-10-28 09:46:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-28 09:46:01,698 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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 [2021-10-28 09:46:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:01,698 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:46:01,698 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 09:46:01,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-10-28 09:46:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 09:46:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 09:46:01,701 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) [2021-10-28 09:46:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-10-28 09:46:01,702 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-10-28 09:46:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:01,703 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-10-28 09:46:01,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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) [2021-10-28 09:46:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-10-28 09:46:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 09:46:01,704 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:01,704 INFO L513 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:01,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-10-28 09:46:01,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:01,917 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1654030867, now seen corresponding path program 55 times [2021-10-28 09:46:01,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:01,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135603549] [2021-10-28 09:46:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:01,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:03,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:03,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135603549] [2021-10-28 09:46:03,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135603549] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:03,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041556040] [2021-10-28 09:46:03,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:46:03,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:03,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:03,206 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:03,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-28 09:46:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-28 09:46:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:04,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041556040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:04,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:04,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-10-28 09:46:04,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400034753] [2021-10-28 09:46:04,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-10-28 09:46:04,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-10-28 09:46:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 09:46:04,060 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 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) [2021-10-28 09:46:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:04,131 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-10-28 09:46:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 09:46:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 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 [2021-10-28 09:46:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:04,133 INFO L225 Difference]: With dead ends: 68 [2021-10-28 09:46:04,133 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:46:04,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 09:46:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:46:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 09:46:04,135 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) [2021-10-28 09:46:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-10-28 09:46:04,136 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-10-28 09:46:04,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:04,136 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-10-28 09:46:04,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 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) [2021-10-28 09:46:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-10-28 09:46:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 09:46:04,137 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:04,137 INFO L513 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:04,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-10-28 09:46:04,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-28 09:46:04,341 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:04,342 INFO L85 PathProgramCache]: Analyzing trace with hash -262985269, now seen corresponding path program 56 times [2021-10-28 09:46:04,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:04,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270629444] [2021-10-28 09:46:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:04,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:05,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:05,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270629444] [2021-10-28 09:46:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270629444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:05,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917561011] [2021-10-28 09:46:05,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:46:05,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:05,646 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:05,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-28 09:46:06,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:46:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:06,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-28 09:46:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:06,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917561011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:06,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:06,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2021-10-28 09:46:06,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76473009] [2021-10-28 09:46:06,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-28 09:46:06,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-28 09:46:06,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 09:46:06,517 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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) [2021-10-28 09:46:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:06,579 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-10-28 09:46:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-28 09:46:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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 [2021-10-28 09:46:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:06,580 INFO L225 Difference]: With dead ends: 69 [2021-10-28 09:46:06,580 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 09:46:06,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 09:46:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 09:46:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-28 09:46:06,583 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) [2021-10-28 09:46:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-10-28 09:46:06,583 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-10-28 09:46:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:06,583 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-10-28 09:46:06,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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) [2021-10-28 09:46:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-10-28 09:46:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 09:46:06,584 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:06,584 INFO L513 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:06,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-28 09:46:06,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-28 09:46:06,809 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 439056659, now seen corresponding path program 57 times [2021-10-28 09:46:06,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:06,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67087653] [2021-10-28 09:46:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:06,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:08,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:08,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67087653] [2021-10-28 09:46:08,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67087653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:08,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585205641] [2021-10-28 09:46:08,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:46:08,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:08,264 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:08,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-28 09:46:08,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-10-28 09:46:08,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:09,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 09:46:09,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:09,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585205641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:09,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:09,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-10-28 09:46:09,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998552108] [2021-10-28 09:46:09,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-28 09:46:09,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-28 09:46:09,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 09:46:09,266 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 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) [2021-10-28 09:46:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:09,338 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-10-28 09:46:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-28 09:46:09,339 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 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 [2021-10-28 09:46:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:09,339 INFO L225 Difference]: With dead ends: 70 [2021-10-28 09:46:09,340 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 09:46:09,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 09:46:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 09:46:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-28 09:46:09,365 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) [2021-10-28 09:46:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-10-28 09:46:09,366 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-10-28 09:46:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:09,366 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-10-28 09:46:09,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 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) [2021-10-28 09:46:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-10-28 09:46:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 09:46:09,367 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:09,367 INFO L513 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:09,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:09,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-28 09:46:09,577 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash 727519947, now seen corresponding path program 58 times [2021-10-28 09:46:09,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:09,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535352277] [2021-10-28 09:46:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:09,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:11,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:11,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535352277] [2021-10-28 09:46:11,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535352277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:11,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484425550] [2021-10-28 09:46:11,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:46:11,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:11,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:11,137 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:11,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-28 09:46:11,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:46:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 09:46:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484425550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:12,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:12,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2021-10-28 09:46:12,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021264902] [2021-10-28 09:46:12,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-10-28 09:46:12,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:12,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-10-28 09:46:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 09:46:12,045 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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) [2021-10-28 09:46:12,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:12,106 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-10-28 09:46:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-28 09:46:12,107 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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 [2021-10-28 09:46:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:12,107 INFO L225 Difference]: With dead ends: 71 [2021-10-28 09:46:12,107 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 09:46:12,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 09:46:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 09:46:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-28 09:46:12,111 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) [2021-10-28 09:46:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-10-28 09:46:12,112 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-10-28 09:46:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:12,112 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-10-28 09:46:12,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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) [2021-10-28 09:46:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-10-28 09:46:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 09:46:12,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:12,113 INFO L513 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:12,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:12,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-28 09:46:12,325 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:12,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1079947283, now seen corresponding path program 59 times [2021-10-28 09:46:12,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:12,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51634694] [2021-10-28 09:46:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:12,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:13,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:13,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51634694] [2021-10-28 09:46:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51634694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:13,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197557637] [2021-10-28 09:46:13,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:46:13,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:13,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:13,849 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:13,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-28 09:46:14,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-10-28 09:46:14,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-28 09:46:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:14,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197557637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:14,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:14,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-10-28 09:46:14,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442251373] [2021-10-28 09:46:14,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 09:46:14,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 09:46:14,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 09:46:14,845 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 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) [2021-10-28 09:46:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:14,906 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-10-28 09:46:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-28 09:46:14,907 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 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 [2021-10-28 09:46:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:14,908 INFO L225 Difference]: With dead ends: 72 [2021-10-28 09:46:14,908 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 09:46:14,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 09:46:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 09:46:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-28 09:46:14,911 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) [2021-10-28 09:46:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-10-28 09:46:14,912 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-10-28 09:46:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:14,912 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-10-28 09:46:14,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 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) [2021-10-28 09:46:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-10-28 09:46:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 09:46:14,913 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:14,914 INFO L513 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:14,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-10-28 09:46:15,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:15,121 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash -879707189, now seen corresponding path program 60 times [2021-10-28 09:46:15,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:15,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603745953] [2021-10-28 09:46:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:15,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:16,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:16,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603745953] [2021-10-28 09:46:16,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603745953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:16,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22072338] [2021-10-28 09:46:16,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:46:16,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:16,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:16,526 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:16,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-28 09:46:17,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-10-28 09:46:17,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:17,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-28 09:46:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:17,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22072338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:17,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:17,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2021-10-28 09:46:17,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728960388] [2021-10-28 09:46:17,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-28 09:46:17,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-28 09:46:17,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:46:17,569 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 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) [2021-10-28 09:46:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:17,630 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-10-28 09:46:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-28 09:46:17,630 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 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 [2021-10-28 09:46:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:17,631 INFO L225 Difference]: With dead ends: 73 [2021-10-28 09:46:17,631 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 09:46:17,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:46:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 09:46:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 09:46:17,634 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) [2021-10-28 09:46:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-10-28 09:46:17,635 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2021-10-28 09:46:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:17,635 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-10-28 09:46:17,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 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) [2021-10-28 09:46:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-10-28 09:46:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-28 09:46:17,636 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:17,636 INFO L513 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:17,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-10-28 09:46:17,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:17,841 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:17,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1499453677, now seen corresponding path program 61 times [2021-10-28 09:46:17,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:17,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996467535] [2021-10-28 09:46:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:17,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:19,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:19,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996467535] [2021-10-28 09:46:19,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996467535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:19,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504312725] [2021-10-28 09:46:19,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:46:19,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:19,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:19,296 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:19,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-28 09:46:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-28 09:46:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:20,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504312725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:20,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:20,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-10-28 09:46:20,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164750545] [2021-10-28 09:46:20,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-10-28 09:46:20,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-10-28 09:46:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 09:46:20,321 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 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) [2021-10-28 09:46:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:20,388 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-10-28 09:46:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-28 09:46:20,388 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 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 [2021-10-28 09:46:20,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:20,389 INFO L225 Difference]: With dead ends: 74 [2021-10-28 09:46:20,389 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 09:46:20,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 09:46:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 09:46:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-28 09:46:20,391 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) [2021-10-28 09:46:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-10-28 09:46:20,392 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2021-10-28 09:46:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:20,392 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-10-28 09:46:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 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) [2021-10-28 09:46:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-10-28 09:46:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-28 09:46:20,392 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:20,393 INFO L513 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:20,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-10-28 09:46:20,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-10-28 09:46:20,597 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash 763241675, now seen corresponding path program 62 times [2021-10-28 09:46:20,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:20,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658834328] [2021-10-28 09:46:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:20,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:22,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:22,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658834328] [2021-10-28 09:46:22,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658834328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:22,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021624961] [2021-10-28 09:46:22,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:46:22,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:22,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:22,402 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:22,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-28 09:46:23,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:46:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-28 09:46:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:23,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021624961] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:23,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:23,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2021-10-28 09:46:23,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287518996] [2021-10-28 09:46:23,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-10-28 09:46:23,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-10-28 09:46:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-10-28 09:46:23,589 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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) [2021-10-28 09:46:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:23,663 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-10-28 09:46:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-28 09:46:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 [2021-10-28 09:46:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:23,664 INFO L225 Difference]: With dead ends: 75 [2021-10-28 09:46:23,664 INFO L226 Difference]: Without dead ends: 71 [2021-10-28 09:46:23,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-10-28 09:46:23,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-28 09:46:23,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-28 09:46:23,667 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) [2021-10-28 09:46:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-10-28 09:46:23,668 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-10-28 09:46:23,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:23,668 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-10-28 09:46:23,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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) [2021-10-28 09:46:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-10-28 09:46:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 09:46:23,669 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:23,670 INFO L513 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:23,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:23,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:23,881 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2107646445, now seen corresponding path program 63 times [2021-10-28 09:46:23,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:23,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16556397] [2021-10-28 09:46:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:23,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:25,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:25,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16556397] [2021-10-28 09:46:25,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16556397] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:25,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413319911] [2021-10-28 09:46:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:46:25,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:25,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:25,572 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:25,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-28 09:46:26,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-10-28 09:46:26,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-28 09:46:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:26,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413319911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:26,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:26,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-10-28 09:46:26,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613731499] [2021-10-28 09:46:26,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 09:46:26,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:26,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 09:46:26,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 09:46:26,653 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 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) [2021-10-28 09:46:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:26,719 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-10-28 09:46:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-28 09:46:26,720 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 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 [2021-10-28 09:46:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:26,720 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:46:26,721 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:46:26,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 09:46:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:46:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-28 09:46:26,724 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) [2021-10-28 09:46:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-10-28 09:46:26,724 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-10-28 09:46:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:26,725 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-10-28 09:46:26,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 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) [2021-10-28 09:46:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-10-28 09:46:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 09:46:26,725 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:26,726 INFO L513 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:26,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:26,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:26,926 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash -910864949, now seen corresponding path program 64 times [2021-10-28 09:46:26,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:26,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672170574] [2021-10-28 09:46:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:26,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:28,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:28,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672170574] [2021-10-28 09:46:28,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672170574] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:28,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927551825] [2021-10-28 09:46:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:46:28,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:28,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:28,606 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:28,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-28 09:46:29,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:46:29,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:29,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-28 09:46:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:29,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927551825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:29,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:29,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2021-10-28 09:46:29,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089274940] [2021-10-28 09:46:29,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-10-28 09:46:29,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:29,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-10-28 09:46:29,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 09:46:29,799 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 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) [2021-10-28 09:46:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:29,888 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-10-28 09:46:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 09:46:29,888 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 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 [2021-10-28 09:46:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:29,889 INFO L225 Difference]: With dead ends: 77 [2021-10-28 09:46:29,890 INFO L226 Difference]: Without dead ends: 73 [2021-10-28 09:46:29,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 09:46:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-28 09:46:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-10-28 09:46:29,894 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) [2021-10-28 09:46:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-10-28 09:46:29,895 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2021-10-28 09:46:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:29,895 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-10-28 09:46:29,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 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) [2021-10-28 09:46:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-10-28 09:46:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 09:46:29,896 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:29,896 INFO L513 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:29,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:30,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-28 09:46:30,121 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:30,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1829623059, now seen corresponding path program 65 times [2021-10-28 09:46:30,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:30,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041246518] [2021-10-28 09:46:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:30,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:32,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:32,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041246518] [2021-10-28 09:46:32,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041246518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:32,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169651323] [2021-10-28 09:46:32,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:46:32,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:32,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:32,009 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:32,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-28 09:46:32,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-10-28 09:46:32,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:32,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-28 09:46:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:33,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169651323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:33,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:33,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-10-28 09:46:33,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145788958] [2021-10-28 09:46:33,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-10-28 09:46:33,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:33,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-10-28 09:46:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 09:46:33,127 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 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) [2021-10-28 09:46:33,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:33,208 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-10-28 09:46:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-28 09:46:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 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 [2021-10-28 09:46:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:33,210 INFO L225 Difference]: With dead ends: 78 [2021-10-28 09:46:33,210 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 09:46:33,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 09:46:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 09:46:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-28 09:46:33,213 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) [2021-10-28 09:46:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-10-28 09:46:33,214 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2021-10-28 09:46:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:33,214 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-10-28 09:46:33,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 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) [2021-10-28 09:46:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-10-28 09:46:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 09:46:33,215 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:33,215 INFO L513 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:33,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:33,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-10-28 09:46:33,433 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:33,433 INFO L85 PathProgramCache]: Analyzing trace with hash 885405387, now seen corresponding path program 66 times [2021-10-28 09:46:33,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:33,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038911122] [2021-10-28 09:46:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:33,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:35,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:35,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038911122] [2021-10-28 09:46:35,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038911122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:35,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777914870] [2021-10-28 09:46:35,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:46:35,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:35,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:35,185 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:35,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-28 09:46:36,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-10-28 09:46:36,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-28 09:46:36,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:36,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777914870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:36,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:36,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2021-10-28 09:46:36,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692037788] [2021-10-28 09:46:36,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-10-28 09:46:36,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-10-28 09:46:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-10-28 09:46:36,394 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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) [2021-10-28 09:46:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:36,481 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-10-28 09:46:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-28 09:46:36,481 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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 [2021-10-28 09:46:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:36,482 INFO L225 Difference]: With dead ends: 79 [2021-10-28 09:46:36,482 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 09:46:36,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-10-28 09:46:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 09:46:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 09:46:36,487 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) [2021-10-28 09:46:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-10-28 09:46:36,487 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2021-10-28 09:46:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:36,488 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-10-28 09:46:36,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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) [2021-10-28 09:46:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-10-28 09:46:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-28 09:46:36,489 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:36,489 INFO L513 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:36,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:36,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-28 09:46:36,703 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1679428627, now seen corresponding path program 67 times [2021-10-28 09:46:36,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:36,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951320206] [2021-10-28 09:46:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:36,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:38,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:38,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951320206] [2021-10-28 09:46:38,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951320206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:38,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209890744] [2021-10-28 09:46:38,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:46:38,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:38,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:38,412 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:38,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-10-28 09:46:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:39,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-28 09:46:39,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:39,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209890744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:39,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:39,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-10-28 09:46:39,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596284639] [2021-10-28 09:46:39,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-10-28 09:46:39,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-10-28 09:46:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 09:46:39,583 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 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) [2021-10-28 09:46:39,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:39,645 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-10-28 09:46:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-28 09:46:39,646 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 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 [2021-10-28 09:46:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:39,646 INFO L225 Difference]: With dead ends: 80 [2021-10-28 09:46:39,646 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 09:46:39,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 09:46:39,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 09:46:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-28 09:46:39,650 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) [2021-10-28 09:46:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-10-28 09:46:39,650 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2021-10-28 09:46:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:39,651 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-10-28 09:46:39,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 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) [2021-10-28 09:46:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-10-28 09:46:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 09:46:39,652 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:39,652 INFO L513 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:39,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:39,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-28 09:46:39,873 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash 524345291, now seen corresponding path program 68 times [2021-10-28 09:46:39,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:39,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161735439] [2021-10-28 09:46:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:39,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:41,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:41,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161735439] [2021-10-28 09:46:41,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161735439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:41,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423140801] [2021-10-28 09:46:41,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:46:41,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:41,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:41,869 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:41,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-10-28 09:46:42,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:46:42,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 09:46:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:43,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423140801] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:43,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:43,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2021-10-28 09:46:43,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15618971] [2021-10-28 09:46:43,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-28 09:46:43,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:43,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-28 09:46:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 09:46:43,215 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 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) [2021-10-28 09:46:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:43,314 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-10-28 09:46:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-10-28 09:46:43,315 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 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 [2021-10-28 09:46:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:43,316 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:46:43,316 INFO L226 Difference]: Without dead ends: 77 [2021-10-28 09:46:43,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 09:46:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-28 09:46:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-28 09:46:43,321 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) [2021-10-28 09:46:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-10-28 09:46:43,322 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2021-10-28 09:46:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:43,323 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-10-28 09:46:43,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 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) [2021-10-28 09:46:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-10-28 09:46:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 09:46:43,324 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:43,324 INFO L513 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:43,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:43,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:43,541 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:43,541 INFO L85 PathProgramCache]: Analyzing trace with hash -923499757, now seen corresponding path program 69 times [2021-10-28 09:46:43,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:43,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918508129] [2021-10-28 09:46:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:43,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:45,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:45,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918508129] [2021-10-28 09:46:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918508129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:45,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258656002] [2021-10-28 09:46:45,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:46:45,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:45,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:45,591 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:45,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-10-28 09:46:46,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-10-28 09:46:46,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-28 09:46:46,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:46,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258656002] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:46,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:46,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-10-28 09:46:46,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930309659] [2021-10-28 09:46:46,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-10-28 09:46:46,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-10-28 09:46:46,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-10-28 09:46:46,985 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 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) [2021-10-28 09:46:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:47,046 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-10-28 09:46:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-28 09:46:47,053 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 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 [2021-10-28 09:46:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:47,053 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:46:47,053 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 09:46:47,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-10-28 09:46:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 09:46:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-28 09:46:47,056 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) [2021-10-28 09:46:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-10-28 09:46:47,057 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2021-10-28 09:46:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:47,058 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-10-28 09:46:47,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 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) [2021-10-28 09:46:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-10-28 09:46:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-28 09:46:47,059 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:47,059 INFO L513 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:47,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-10-28 09:46:47,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:47,269 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:47,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1437944011, now seen corresponding path program 70 times [2021-10-28 09:46:47,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:47,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915875483] [2021-10-28 09:46:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:47,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:49,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:49,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915875483] [2021-10-28 09:46:49,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915875483] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:49,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962366507] [2021-10-28 09:46:49,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:46:49,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:49,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:49,371 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:49,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-10-28 09:46:50,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:46:50,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-28 09:46:50,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:50,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962366507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:50,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:50,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2021-10-28 09:46:50,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233003966] [2021-10-28 09:46:50,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-28 09:46:50,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-28 09:46:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-10-28 09:46:50,720 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 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) [2021-10-28 09:46:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:50,795 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-10-28 09:46:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-10-28 09:46:50,796 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 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 [2021-10-28 09:46:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:50,797 INFO L225 Difference]: With dead ends: 83 [2021-10-28 09:46:50,797 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 09:46:50,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-10-28 09:46:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 09:46:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-28 09:46:50,801 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) [2021-10-28 09:46:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-10-28 09:46:50,802 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2021-10-28 09:46:50,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:50,803 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-10-28 09:46:50,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 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) [2021-10-28 09:46:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-10-28 09:46:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-28 09:46:50,804 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:50,804 INFO L513 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:50,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:51,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-10-28 09:46:51,017 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:51,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1628256787, now seen corresponding path program 71 times [2021-10-28 09:46:51,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:51,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381325732] [2021-10-28 09:46:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:51,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:53,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:53,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381325732] [2021-10-28 09:46:53,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381325732] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:53,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370458538] [2021-10-28 09:46:53,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:46:53,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:53,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:53,230 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:53,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-10-28 09:46:54,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-10-28 09:46:54,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-28 09:46:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:54,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370458538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:54,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:54,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-10-28 09:46:54,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072074201] [2021-10-28 09:46:54,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-10-28 09:46:54,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-10-28 09:46:54,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 09:46:54,758 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 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) [2021-10-28 09:46:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:54,835 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-10-28 09:46:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-28 09:46:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 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 [2021-10-28 09:46:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:54,836 INFO L225 Difference]: With dead ends: 84 [2021-10-28 09:46:54,837 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 09:46:54,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 09:46:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 09:46:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-28 09:46:54,840 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) [2021-10-28 09:46:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-10-28 09:46:54,840 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2021-10-28 09:46:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:54,841 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-10-28 09:46:54,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 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) [2021-10-28 09:46:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-10-28 09:46:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 09:46:54,842 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:54,842 INFO L513 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:54,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-10-28 09:46:55,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:55,069 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1061981749, now seen corresponding path program 72 times [2021-10-28 09:46:55,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:55,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687045025] [2021-10-28 09:46:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:55,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:46:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:57,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:46:57,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687045025] [2021-10-28 09:46:57,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687045025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:57,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756194756] [2021-10-28 09:46:57,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:46:57,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:57,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:46:57,298 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:46:57,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-10-28 09:46:58,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-10-28 09:46:58,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:46:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-28 09:46:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:46:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:46:58,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756194756] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:46:58,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:46:58,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2021-10-28 09:46:58,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876309579] [2021-10-28 09:46:58,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-28 09:46:58,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:46:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-28 09:46:58,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 09:46:58,843 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 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) [2021-10-28 09:46:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:46:58,906 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-10-28 09:46:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-28 09:46:58,906 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 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 [2021-10-28 09:46:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:46:58,907 INFO L225 Difference]: With dead ends: 85 [2021-10-28 09:46:58,907 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:46:58,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 09:46:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:46:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-28 09:46:58,910 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) [2021-10-28 09:46:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-10-28 09:46:58,911 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2021-10-28 09:46:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:46:58,912 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-10-28 09:46:58,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 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) [2021-10-28 09:46:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-10-28 09:46:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-28 09:46:58,913 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:46:58,913 INFO L513 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:46:58,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-10-28 09:46:59,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:46:59,129 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:46:59,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:46:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1439969555, now seen corresponding path program 73 times [2021-10-28 09:46:59,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:46:59,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207800032] [2021-10-28 09:46:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:46:59,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:46:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:01,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:01,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207800032] [2021-10-28 09:47:01,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207800032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:01,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581615332] [2021-10-28 09:47:01,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:47:01,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:01,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:01,454 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:01,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-10-28 09:47:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-28 09:47:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:03,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581615332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:03,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:03,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-10-28 09:47:03,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894855556] [2021-10-28 09:47:03,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-10-28 09:47:03,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:03,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-10-28 09:47:03,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-10-28 09:47:03,045 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 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) [2021-10-28 09:47:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:03,153 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-10-28 09:47:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-28 09:47:03,154 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 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 [2021-10-28 09:47:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:03,155 INFO L225 Difference]: With dead ends: 86 [2021-10-28 09:47:03,156 INFO L226 Difference]: Without dead ends: 82 [2021-10-28 09:47:03,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-10-28 09:47:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-28 09:47:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-28 09:47:03,161 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) [2021-10-28 09:47:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-10-28 09:47:03,161 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2021-10-28 09:47:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:03,162 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-10-28 09:47:03,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 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) [2021-10-28 09:47:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-10-28 09:47:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 09:47:03,163 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:03,164 INFO L513 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:03,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-10-28 09:47:03,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:03,389 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1691048651, now seen corresponding path program 74 times [2021-10-28 09:47:03,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:03,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033790708] [2021-10-28 09:47:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:03,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:05,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:05,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033790708] [2021-10-28 09:47:05,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033790708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:05,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253844695] [2021-10-28 09:47:05,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:47:05,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:05,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:05,753 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:05,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-10-28 09:47:07,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:47:07,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-28 09:47:07,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:07,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253844695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:07,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:07,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2021-10-28 09:47:07,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342700488] [2021-10-28 09:47:07,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-10-28 09:47:07,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-10-28 09:47:07,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 09:47:07,286 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 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) [2021-10-28 09:47:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:07,374 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-10-28 09:47:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-10-28 09:47:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 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 [2021-10-28 09:47:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:07,376 INFO L225 Difference]: With dead ends: 87 [2021-10-28 09:47:07,376 INFO L226 Difference]: Without dead ends: 83 [2021-10-28 09:47:07,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 09:47:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-28 09:47:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-28 09:47:07,380 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) [2021-10-28 09:47:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-10-28 09:47:07,381 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2021-10-28 09:47:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:07,381 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-10-28 09:47:07,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 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) [2021-10-28 09:47:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-10-28 09:47:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 09:47:07,383 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:07,383 INFO L513 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:07,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:07,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-10-28 09:47:07,597 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash 884566035, now seen corresponding path program 75 times [2021-10-28 09:47:07,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:07,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121462431] [2021-10-28 09:47:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:07,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:10,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:10,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121462431] [2021-10-28 09:47:10,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121462431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:10,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398746356] [2021-10-28 09:47:10,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:47:10,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:10,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:10,263 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:10,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-10-28 09:47:11,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-10-28 09:47:11,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-28 09:47:11,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:11,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398746356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:11,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:11,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-10-28 09:47:11,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911661258] [2021-10-28 09:47:11,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-10-28 09:47:11,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-10-28 09:47:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-10-28 09:47:11,886 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 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) [2021-10-28 09:47:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:11,982 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-10-28 09:47:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-28 09:47:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 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 [2021-10-28 09:47:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:11,984 INFO L225 Difference]: With dead ends: 88 [2021-10-28 09:47:11,984 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 09:47:11,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-10-28 09:47:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 09:47:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-28 09:47:11,989 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) [2021-10-28 09:47:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-10-28 09:47:11,990 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2021-10-28 09:47:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-10-28 09:47:11,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 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) [2021-10-28 09:47:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-10-28 09:47:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-28 09:47:11,991 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:11,991 INFO L513 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:12,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:12,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:12,205 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1653408715, now seen corresponding path program 76 times [2021-10-28 09:47:12,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:12,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73394314] [2021-10-28 09:47:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:12,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:14,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:14,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73394314] [2021-10-28 09:47:14,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73394314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:14,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442102676] [2021-10-28 09:47:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:47:14,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:14,705 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:14,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-10-28 09:47:16,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:47:16,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:16,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 09:47:16,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:16,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442102676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:16,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:16,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2021-10-28 09:47:16,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901493131] [2021-10-28 09:47:16,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-10-28 09:47:16,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:16,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-10-28 09:47:16,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-10-28 09:47:16,414 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 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) [2021-10-28 09:47:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:16,521 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-10-28 09:47:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-28 09:47:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 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 [2021-10-28 09:47:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:16,523 INFO L225 Difference]: With dead ends: 89 [2021-10-28 09:47:16,523 INFO L226 Difference]: Without dead ends: 85 [2021-10-28 09:47:16,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-10-28 09:47:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-28 09:47:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-10-28 09:47:16,527 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) [2021-10-28 09:47:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-10-28 09:47:16,528 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2021-10-28 09:47:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:16,528 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-10-28 09:47:16,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 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) [2021-10-28 09:47:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-10-28 09:47:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-28 09:47:16,530 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:16,530 INFO L513 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:16,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:16,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:16,757 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:16,757 INFO L85 PathProgramCache]: Analyzing trace with hash -282271981, now seen corresponding path program 77 times [2021-10-28 09:47:16,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:16,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140279921] [2021-10-28 09:47:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:16,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:19,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:19,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140279921] [2021-10-28 09:47:19,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140279921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:19,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836904324] [2021-10-28 09:47:19,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:47:19,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:19,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:19,269 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:19,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-28 09:47:20,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-10-28 09:47:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-28 09:47:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:20,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836904324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:20,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:20,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2021-10-28 09:47:20,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164921107] [2021-10-28 09:47:20,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-28 09:47:20,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:20,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-28 09:47:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 09:47:20,957 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 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) [2021-10-28 09:47:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:21,027 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-10-28 09:47:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-28 09:47:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 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 [2021-10-28 09:47:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:21,028 INFO L225 Difference]: With dead ends: 90 [2021-10-28 09:47:21,028 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 09:47:21,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 09:47:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 09:47:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-10-28 09:47:21,030 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) [2021-10-28 09:47:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-10-28 09:47:21,031 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2021-10-28 09:47:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:21,031 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-10-28 09:47:21,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 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) [2021-10-28 09:47:21,032 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-10-28 09:47:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 09:47:21,032 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:21,032 INFO L513 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:21,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-10-28 09:47:21,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-10-28 09:47:21,261 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash -158831413, now seen corresponding path program 78 times [2021-10-28 09:47:21,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:21,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080659418] [2021-10-28 09:47:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:21,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:23,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:23,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080659418] [2021-10-28 09:47:23,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080659418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:23,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929224815] [2021-10-28 09:47:23,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:47:23,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:23,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:23,902 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:23,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-28 09:47:25,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-10-28 09:47:25,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-28 09:47:25,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:25,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929224815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:25,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:25,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2021-10-28 09:47:25,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724395707] [2021-10-28 09:47:25,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-10-28 09:47:25,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-10-28 09:47:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-10-28 09:47:25,685 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 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) [2021-10-28 09:47:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:25,820 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-10-28 09:47:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-10-28 09:47:25,821 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 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 [2021-10-28 09:47:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:25,822 INFO L225 Difference]: With dead ends: 91 [2021-10-28 09:47:25,822 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 09:47:25,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-10-28 09:47:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 09:47:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-28 09:47:25,826 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) [2021-10-28 09:47:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-10-28 09:47:25,827 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2021-10-28 09:47:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:25,828 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-10-28 09:47:25,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 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) [2021-10-28 09:47:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-10-28 09:47:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 09:47:25,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:25,829 INFO L513 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:25,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:26,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-10-28 09:47:26,055 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash -627141101, now seen corresponding path program 79 times [2021-10-28 09:47:26,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:26,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277615667] [2021-10-28 09:47:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:26,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:28,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:28,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277615667] [2021-10-28 09:47:28,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277615667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:28,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790691336] [2021-10-28 09:47:28,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:47:28,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:28,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:28,924 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:28,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-28 09:47:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:30,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-28 09:47:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:30,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790691336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:30,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:30,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-10-28 09:47:30,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100282524] [2021-10-28 09:47:30,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-10-28 09:47:30,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-10-28 09:47:30,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-10-28 09:47:30,679 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 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) [2021-10-28 09:47:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:30,763 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-10-28 09:47:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-28 09:47:30,763 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 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 [2021-10-28 09:47:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:30,764 INFO L225 Difference]: With dead ends: 92 [2021-10-28 09:47:30,764 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 09:47:30,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-10-28 09:47:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 09:47:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-28 09:47:30,771 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) [2021-10-28 09:47:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-10-28 09:47:30,772 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2021-10-28 09:47:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-10-28 09:47:30,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 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) [2021-10-28 09:47:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-10-28 09:47:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-28 09:47:30,773 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:30,773 INFO L513 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:30,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:30,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:30,993 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2035127755, now seen corresponding path program 80 times [2021-10-28 09:47:30,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:30,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893451607] [2021-10-28 09:47:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:30,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:33,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:33,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893451607] [2021-10-28 09:47:33,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893451607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:33,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167263669] [2021-10-28 09:47:33,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:47:33,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:33,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:33,885 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:33,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-28 09:47:35,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:47:35,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:35,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 82 conjunts are in the unsatisfiable core [2021-10-28 09:47:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:35,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167263669] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:35,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:35,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2021-10-28 09:47:35,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922370422] [2021-10-28 09:47:35,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-10-28 09:47:35,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:35,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-10-28 09:47:35,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 09:47:35,788 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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) [2021-10-28 09:47:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:35,894 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-10-28 09:47:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-10-28 09:47:35,894 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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 [2021-10-28 09:47:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:35,895 INFO L225 Difference]: With dead ends: 93 [2021-10-28 09:47:35,896 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 09:47:35,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 09:47:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 09:47:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-10-28 09:47:35,902 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) [2021-10-28 09:47:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-10-28 09:47:35,902 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2021-10-28 09:47:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:35,903 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-10-28 09:47:35,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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) [2021-10-28 09:47:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-10-28 09:47:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-28 09:47:35,904 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:35,905 INFO L513 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:35,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:36,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:36,125 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:36,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1333883629, now seen corresponding path program 81 times [2021-10-28 09:47:36,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:36,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483074725] [2021-10-28 09:47:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:36,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:39,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:39,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483074725] [2021-10-28 09:47:39,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483074725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:39,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770482720] [2021-10-28 09:47:39,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:47:39,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:39,008 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:39,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-28 09:47:40,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-10-28 09:47:40,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-28 09:47:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:40,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770482720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:40,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:40,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-10-28 09:47:40,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200012426] [2021-10-28 09:47:40,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-10-28 09:47:40,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-10-28 09:47:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-10-28 09:47:40,866 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 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) [2021-10-28 09:47:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:40,953 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-10-28 09:47:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-28 09:47:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-10-28 09:47:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:40,954 INFO L225 Difference]: With dead ends: 94 [2021-10-28 09:47:40,954 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 09:47:40,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-10-28 09:47:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 09:47:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-28 09:47:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-10-28 09:47:40,964 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2021-10-28 09:47:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:40,964 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-10-28 09:47:40,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 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) [2021-10-28 09:47:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-10-28 09:47:40,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 09:47:40,966 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:40,966 INFO L513 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:41,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:41,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:41,177 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1600945867, now seen corresponding path program 82 times [2021-10-28 09:47:41,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:41,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157612681] [2021-10-28 09:47:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:41,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:44,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:44,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157612681] [2021-10-28 09:47:44,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157612681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:44,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551866755] [2021-10-28 09:47:44,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:47:44,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:44,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:44,086 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:44,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-28 09:47:45,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:47:45,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-28 09:47:45,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:46,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551866755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:46,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:46,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2021-10-28 09:47:46,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103484910] [2021-10-28 09:47:46,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-10-28 09:47:46,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:46,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-10-28 09:47:46,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-28 09:47:46,065 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 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) [2021-10-28 09:47:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:46,149 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-10-28 09:47:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-10-28 09:47:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-10-28 09:47:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:46,150 INFO L225 Difference]: With dead ends: 95 [2021-10-28 09:47:46,150 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 09:47:46,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-28 09:47:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 09:47:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-10-28 09:47:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-10-28 09:47:46,154 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2021-10-28 09:47:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:46,154 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-10-28 09:47:46,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 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) [2021-10-28 09:47:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-10-28 09:47:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-28 09:47:46,155 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:46,155 INFO L513 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:46,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-10-28 09:47:46,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:46,356 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:46,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1908620269, now seen corresponding path program 83 times [2021-10-28 09:47:46,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:46,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288832121] [2021-10-28 09:47:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:46,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:49,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:49,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288832121] [2021-10-28 09:47:49,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288832121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:49,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415707037] [2021-10-28 09:47:49,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:47:49,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:49,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:49,362 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:49,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-28 09:47:50,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-10-28 09:47:50,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:50,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-28 09:47:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:51,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415707037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:51,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:51,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-10-28 09:47:51,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458099649] [2021-10-28 09:47:51,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-10-28 09:47:51,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-10-28 09:47:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-10-28 09:47:51,303 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:51,371 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-10-28 09:47:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-28 09:47:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-28 09:47:51,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:51,372 INFO L225 Difference]: With dead ends: 96 [2021-10-28 09:47:51,372 INFO L226 Difference]: Without dead ends: 92 [2021-10-28 09:47:51,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-10-28 09:47:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-28 09:47:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-28 09:47:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-10-28 09:47:51,375 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2021-10-28 09:47:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:51,376 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-10-28 09:47:51,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-10-28 09:47:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 09:47:51,377 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:51,377 INFO L513 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:51,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-10-28 09:47:51,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-10-28 09:47:51,593 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:51,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:51,594 INFO L85 PathProgramCache]: Analyzing trace with hash 963979211, now seen corresponding path program 84 times [2021-10-28 09:47:51,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:51,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793944569] [2021-10-28 09:47:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:51,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:54,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:54,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793944569] [2021-10-28 09:47:54,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793944569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:54,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441858296] [2021-10-28 09:47:54,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:47:54,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:54,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:54,713 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:54,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-28 09:47:56,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-10-28 09:47:56,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:56,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-28 09:47:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:47:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441858296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:56,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:56,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2021-10-28 09:47:56,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84252425] [2021-10-28 09:47:56,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-10-28 09:47:56,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-10-28 09:47:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-10-28 09:47:56,732 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:56,836 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-10-28 09:47:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-10-28 09:47:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-10-28 09:47:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:56,837 INFO L225 Difference]: With dead ends: 97 [2021-10-28 09:47:56,837 INFO L226 Difference]: Without dead ends: 93 [2021-10-28 09:47:56,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-10-28 09:47:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-28 09:47:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-10-28 09:47:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-10-28 09:47:56,841 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2021-10-28 09:47:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:56,841 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-10-28 09:47:56,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-10-28 09:47:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 09:47:56,842 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:56,843 INFO L513 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:56,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:57,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:57,043 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash -179750125, now seen corresponding path program 85 times [2021-10-28 09:47:57,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:57,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898105584] [2021-10-28 09:47:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:57,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:00,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:00,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898105584] [2021-10-28 09:48:00,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898105584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:00,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27053809] [2021-10-28 09:48:00,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:48:00,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:00,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:00,162 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:00,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-28 09:48:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:01,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-28 09:48:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:02,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27053809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:02,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:02,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-10-28 09:48:02,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560240590] [2021-10-28 09:48:02,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-10-28 09:48:02,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-10-28 09:48:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-10-28 09:48:02,201 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:02,301 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-10-28 09:48:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-28 09:48:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-10-28 09:48:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:02,303 INFO L225 Difference]: With dead ends: 98 [2021-10-28 09:48:02,303 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 09:48:02,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-10-28 09:48:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 09:48:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-28 09:48:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-10-28 09:48:02,308 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2021-10-28 09:48:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:02,308 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-10-28 09:48:02,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-10-28 09:48:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-28 09:48:02,309 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:02,310 INFO L513 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:02,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-10-28 09:48:02,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:02,525 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:02,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1275621173, now seen corresponding path program 86 times [2021-10-28 09:48:02,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:02,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358770934] [2021-10-28 09:48:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:02,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:05,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:05,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358770934] [2021-10-28 09:48:05,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358770934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:05,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235331619] [2021-10-28 09:48:05,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:48:05,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:05,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:05,848 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:05,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-28 09:48:07,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:48:07,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:07,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 88 conjunts are in the unsatisfiable core [2021-10-28 09:48:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:07,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235331619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:07,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:07,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2021-10-28 09:48:07,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287863905] [2021-10-28 09:48:07,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-10-28 09:48:07,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-10-28 09:48:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-10-28 09:48:07,936 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:08,050 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-10-28 09:48:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-10-28 09:48:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-28 09:48:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:08,051 INFO L225 Difference]: With dead ends: 99 [2021-10-28 09:48:08,052 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 09:48:08,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-10-28 09:48:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 09:48:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-28 09:48:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-10-28 09:48:08,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2021-10-28 09:48:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:08,057 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-10-28 09:48:08,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-10-28 09:48:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:48:08,059 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:08,059 INFO L513 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:08,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:08,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-10-28 09:48:08,285 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:08,286 INFO L85 PathProgramCache]: Analyzing trace with hash -887885293, now seen corresponding path program 87 times [2021-10-28 09:48:08,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:08,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240882279] [2021-10-28 09:48:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:08,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:11,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:11,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240882279] [2021-10-28 09:48:11,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240882279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:11,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067564468] [2021-10-28 09:48:11,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:48:11,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:11,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:11,508 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:11,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-10-28 09:48:13,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-10-28 09:48:13,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:13,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-28 09:48:13,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067564468] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:13,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:13,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2021-10-28 09:48:13,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126588365] [2021-10-28 09:48:13,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-28 09:48:13,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:13,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-28 09:48:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 09:48:13,602 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:13,724 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-10-28 09:48:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-28 09:48:13,725 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-10-28 09:48:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:13,726 INFO L225 Difference]: With dead ends: 100 [2021-10-28 09:48:13,726 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 09:48:13,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 09:48:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 09:48:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-28 09:48:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-10-28 09:48:13,731 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2021-10-28 09:48:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:13,732 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-10-28 09:48:13,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-10-28 09:48:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 09:48:13,733 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:13,733 INFO L513 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:13,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:13,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-10-28 09:48:13,957 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1752974901, now seen corresponding path program 88 times [2021-10-28 09:48:13,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:13,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248656370] [2021-10-28 09:48:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:13,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:17,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:17,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248656370] [2021-10-28 09:48:17,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248656370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:17,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521302581] [2021-10-28 09:48:17,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:48:17,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:17,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:17,237 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:17,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-10-28 09:48:19,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:48:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:19,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 90 conjunts are in the unsatisfiable core [2021-10-28 09:48:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:19,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521302581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:19,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:19,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2021-10-28 09:48:19,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474683833] [2021-10-28 09:48:19,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-10-28 09:48:19,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-10-28 09:48:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-10-28 09:48:19,398 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:19,492 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-10-28 09:48:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-10-28 09:48:19,493 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-10-28 09:48:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:19,493 INFO L225 Difference]: With dead ends: 101 [2021-10-28 09:48:19,494 INFO L226 Difference]: Without dead ends: 97 [2021-10-28 09:48:19,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-10-28 09:48:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-28 09:48:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-10-28 09:48:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-10-28 09:48:19,497 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2021-10-28 09:48:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:19,498 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-10-28 09:48:19,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-10-28 09:48:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-28 09:48:19,498 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:19,498 INFO L513 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:19,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-10-28 09:48:19,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-10-28 09:48:19,699 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1494018323, now seen corresponding path program 89 times [2021-10-28 09:48:19,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:19,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514452473] [2021-10-28 09:48:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:19,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:23,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:23,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514452473] [2021-10-28 09:48:23,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514452473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:23,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80512298] [2021-10-28 09:48:23,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:48:23,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:23,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:23,102 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:23,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-10-28 09:48:24,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-10-28 09:48:24,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:24,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-28 09:48:24,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:25,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80512298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:25,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:25,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2021-10-28 09:48:25,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887512517] [2021-10-28 09:48:25,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-10-28 09:48:25,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-10-28 09:48:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 09:48:25,122 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:25,203 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-10-28 09:48:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-10-28 09:48:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-10-28 09:48:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:25,205 INFO L225 Difference]: With dead ends: 102 [2021-10-28 09:48:25,205 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 09:48:25,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 09:48:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 09:48:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-28 09:48:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-10-28 09:48:25,209 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2021-10-28 09:48:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:25,210 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-10-28 09:48:25,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-10-28 09:48:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-28 09:48:25,210 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:25,210 INFO L513 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:25,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:25,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:25,411 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash -928406837, now seen corresponding path program 90 times [2021-10-28 09:48:25,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:25,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819305558] [2021-10-28 09:48:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:25,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:28,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:28,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819305558] [2021-10-28 09:48:28,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819305558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:28,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673267728] [2021-10-28 09:48:28,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:48:28,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:28,260 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:28,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-10-28 09:48:29,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2021-10-28 09:48:29,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-28 09:48:29,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:30,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673267728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:30,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:30,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2021-10-28 09:48:30,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625708233] [2021-10-28 09:48:30,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-10-28 09:48:30,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:30,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-10-28 09:48:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-10-28 09:48:30,086 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:30,225 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-10-28 09:48:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-10-28 09:48:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-10-28 09:48:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:30,227 INFO L225 Difference]: With dead ends: 103 [2021-10-28 09:48:30,227 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 09:48:30,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-10-28 09:48:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 09:48:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-28 09:48:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-10-28 09:48:30,234 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2021-10-28 09:48:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:30,234 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-10-28 09:48:30,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-10-28 09:48:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-28 09:48:30,236 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:30,236 INFO L513 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:30,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:30,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:30,449 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:30,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1285824531, now seen corresponding path program 91 times [2021-10-28 09:48:30,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:30,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120181860] [2021-10-28 09:48:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:30,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:33,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:33,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120181860] [2021-10-28 09:48:33,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120181860] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:33,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084719327] [2021-10-28 09:48:33,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:48:33,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:33,502 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:33,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-28 09:48:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-28 09:48:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:35,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084719327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:35,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:35,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2021-10-28 09:48:35,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864001682] [2021-10-28 09:48:35,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-10-28 09:48:35,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-10-28 09:48:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-28 09:48:35,355 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:35,467 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-10-28 09:48:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-28 09:48:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-28 09:48:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:35,469 INFO L225 Difference]: With dead ends: 104 [2021-10-28 09:48:35,469 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 09:48:35,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-28 09:48:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 09:48:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-28 09:48:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-10-28 09:48:35,472 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2021-10-28 09:48:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:35,472 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-10-28 09:48:35,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-10-28 09:48:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-28 09:48:35,473 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:35,473 INFO L513 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:35,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:35,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:35,674 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:35,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1207520203, now seen corresponding path program 92 times [2021-10-28 09:48:35,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:35,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110505213] [2021-10-28 09:48:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:35,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:38,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:38,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110505213] [2021-10-28 09:48:38,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110505213] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:38,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356453271] [2021-10-28 09:48:38,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:48:38,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:38,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:38,653 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:38,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-10-28 09:48:40,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:48:40,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 94 conjunts are in the unsatisfiable core [2021-10-28 09:48:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:40,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356453271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:40,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:40,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2021-10-28 09:48:40,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852258802] [2021-10-28 09:48:40,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-10-28 09:48:40,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-10-28 09:48:40,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-10-28 09:48:40,561 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:40,646 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2021-10-28 09:48:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-10-28 09:48:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-10-28 09:48:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:40,647 INFO L225 Difference]: With dead ends: 105 [2021-10-28 09:48:40,647 INFO L226 Difference]: Without dead ends: 101 [2021-10-28 09:48:40,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-10-28 09:48:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-28 09:48:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-28 09:48:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-10-28 09:48:40,651 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2021-10-28 09:48:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:40,651 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-10-28 09:48:40,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-10-28 09:48:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 09:48:40,652 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:40,652 INFO L513 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:40,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:40,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-10-28 09:48:40,853 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1219913965, now seen corresponding path program 93 times [2021-10-28 09:48:40,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:40,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860083559] [2021-10-28 09:48:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:40,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:43,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:43,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860083559] [2021-10-28 09:48:43,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860083559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:43,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118903049] [2021-10-28 09:48:43,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:48:43,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:43,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:43,878 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:43,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-10-28 09:48:45,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-10-28 09:48:45,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-28 09:48:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:45,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118903049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:45,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:45,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2021-10-28 09:48:45,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488733759] [2021-10-28 09:48:45,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-28 09:48:45,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:45,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-28 09:48:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 09:48:45,854 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:45,943 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-10-28 09:48:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-28 09:48:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-28 09:48:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:45,944 INFO L225 Difference]: With dead ends: 106 [2021-10-28 09:48:45,944 INFO L226 Difference]: Without dead ends: 102 [2021-10-28 09:48:45,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 09:48:45,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-28 09:48:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-10-28 09:48:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-10-28 09:48:45,949 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2021-10-28 09:48:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:45,949 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-10-28 09:48:45,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-10-28 09:48:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-28 09:48:45,950 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:45,951 INFO L513 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:45,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-10-28 09:48:46,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:46,151 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash 839038155, now seen corresponding path program 94 times [2021-10-28 09:48:46,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:46,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491769092] [2021-10-28 09:48:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:46,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:49,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:49,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491769092] [2021-10-28 09:48:49,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491769092] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:49,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524351899] [2021-10-28 09:48:49,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:48:49,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:49,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:49,249 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:49,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-10-28 09:48:50,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:48:50,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:50,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-28 09:48:50,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:51,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524351899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:51,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:51,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2021-10-28 09:48:51,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290383037] [2021-10-28 09:48:51,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-10-28 09:48:51,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:51,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-10-28 09:48:51,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-28 09:48:51,179 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:51,308 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2021-10-28 09:48:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-28 09:48:51,308 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-10-28 09:48:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:51,309 INFO L225 Difference]: With dead ends: 107 [2021-10-28 09:48:51,309 INFO L226 Difference]: Without dead ends: 103 [2021-10-28 09:48:51,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-28 09:48:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-28 09:48:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-10-28 09:48:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-10-28 09:48:51,312 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2021-10-28 09:48:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:51,313 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-10-28 09:48:51,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-10-28 09:48:51,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-28 09:48:51,313 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:51,314 INFO L513 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:51,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:51,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:51,514 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash 242044435, now seen corresponding path program 95 times [2021-10-28 09:48:51,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:51,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617577405] [2021-10-28 09:48:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:51,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:54,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:54,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617577405] [2021-10-28 09:48:54,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617577405] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:54,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814037975] [2021-10-28 09:48:54,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:48:54,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:54,637 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:54,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-10-28 09:48:56,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-10-28 09:48:56,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:56,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-28 09:48:56,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:56,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814037975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:56,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:56,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2021-10-28 09:48:56,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275575288] [2021-10-28 09:48:56,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-10-28 09:48:56,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-10-28 09:48:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-10-28 09:48:56,616 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:56,697 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-10-28 09:48:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-28 09:48:56,698 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-10-28 09:48:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:56,698 INFO L225 Difference]: With dead ends: 108 [2021-10-28 09:48:56,699 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 09:48:56,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-10-28 09:48:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 09:48:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-28 09:48:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2021-10-28 09:48:56,702 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2021-10-28 09:48:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:56,702 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2021-10-28 09:48:56,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2021-10-28 09:48:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-28 09:48:56,703 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:56,703 INFO L513 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:56,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:56,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-10-28 09:48:56,917 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1084891701, now seen corresponding path program 96 times [2021-10-28 09:48:56,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:56,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180087885] [2021-10-28 09:48:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:56,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:00,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:00,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180087885] [2021-10-28 09:49:00,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180087885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:00,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891191869] [2021-10-28 09:49:00,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:49:00,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:00,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:00,068 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:00,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-10-28 09:49:01,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-10-28 09:49:01,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-28 09:49:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:02,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891191869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:02,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:02,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2021-10-28 09:49:02,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091838070] [2021-10-28 09:49:02,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-10-28 09:49:02,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-10-28 09:49:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 09:49:02,093 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:02,180 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-10-28 09:49:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-10-28 09:49:02,181 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-10-28 09:49:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:02,181 INFO L225 Difference]: With dead ends: 109 [2021-10-28 09:49:02,181 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 09:49:02,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 09:49:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 09:49:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-10-28 09:49:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-10-28 09:49:02,185 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2021-10-28 09:49:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:02,186 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-10-28 09:49:02,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-10-28 09:49:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-28 09:49:02,187 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:02,187 INFO L513 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:02,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-10-28 09:49:02,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-10-28 09:49:02,405 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:49:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash 729761043, now seen corresponding path program 97 times [2021-10-28 09:49:02,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:02,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917755717] [2021-10-28 09:49:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:02,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:05,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:05,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917755717] [2021-10-28 09:49:05,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917755717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:05,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973939457] [2021-10-28 09:49:05,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:49:05,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:05,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:05,650 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:05,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-10-28 09:49:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:07,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-28 09:49:07,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:07,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973939457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:07,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:07,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2021-10-28 09:49:07,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994553008] [2021-10-28 09:49:07,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-10-28 09:49:07,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-10-28 09:49:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-10-28 09:49:07,761 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:07,837 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-10-28 09:49:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-28 09:49:07,838 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-28 09:49:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:07,839 INFO L225 Difference]: With dead ends: 110 [2021-10-28 09:49:07,839 INFO L226 Difference]: Without dead ends: 106 [2021-10-28 09:49:07,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-10-28 09:49:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-28 09:49:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-28 09:49:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2021-10-28 09:49:07,842 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2021-10-28 09:49:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:07,843 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2021-10-28 09:49:07,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2021-10-28 09:49:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-28 09:49:07,844 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:07,844 INFO L513 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:07,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:08,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:08,069 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:49:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:08,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1149421259, now seen corresponding path program 98 times [2021-10-28 09:49:08,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:08,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766026818] [2021-10-28 09:49:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:08,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:11,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:11,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766026818] [2021-10-28 09:49:11,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766026818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:11,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561317463] [2021-10-28 09:49:11,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:49:11,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:11,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:11,424 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:11,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-10-28 09:49:13,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:49:13,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-28 09:49:13,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:13,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561317463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:13,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:13,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2021-10-28 09:49:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910180569] [2021-10-28 09:49:13,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-10-28 09:49:13,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:13,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-10-28 09:49:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-28 09:49:13,465 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:13,572 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2021-10-28 09:49:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-10-28 09:49:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-28 09:49:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:13,573 INFO L225 Difference]: With dead ends: 111 [2021-10-28 09:49:13,573 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 09:49:13,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-28 09:49:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 09:49:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-28 09:49:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-10-28 09:49:13,578 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2021-10-28 09:49:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:13,578 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-10-28 09:49:13,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-10-28 09:49:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 09:49:13,579 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:13,580 INFO L513 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:13,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:13,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:13,789 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:49:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:13,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1273986067, now seen corresponding path program 99 times [2021-10-28 09:49:13,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:13,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836590611] [2021-10-28 09:49:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:13,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:17,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:17,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836590611] [2021-10-28 09:49:17,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836590611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:17,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017941875] [2021-10-28 09:49:17,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:49:17,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:17,165 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:17,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-10-28 09:49:19,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2021-10-28 09:49:19,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:19,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-28 09:49:19,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:19,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017941875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:19,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:19,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2021-10-28 09:49:19,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994610446] [2021-10-28 09:49:19,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-10-28 09:49:19,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:19,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-10-28 09:49:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 09:49:19,360 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:19,470 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-10-28 09:49:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-28 09:49:19,470 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-10-28 09:49:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:19,471 INFO L225 Difference]: With dead ends: 112 [2021-10-28 09:49:19,471 INFO L226 Difference]: Without dead ends: 108 [2021-10-28 09:49:19,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 09:49:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-28 09:49:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-28 09:49:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2021-10-28 09:49:19,476 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2021-10-28 09:49:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:19,476 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2021-10-28 09:49:19,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2021-10-28 09:49:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-28 09:49:19,477 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:19,478 INFO L513 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:19,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:19,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-10-28 09:49:19,693 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:49:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash 840527819, now seen corresponding path program 100 times [2021-10-28 09:49:19,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:19,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800400165] [2021-10-28 09:49:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:19,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:24,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:24,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800400165] [2021-10-28 09:49:24,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800400165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:24,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651565048] [2021-10-28 09:49:24,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:49:24,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:24,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:24,370 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:24,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-10-28 09:49:26,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:49:26,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:26,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 205 conjunts are in the unsatisfiable core [2021-10-28 09:49:26,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:27,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651565048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:27,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:27,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-10-28 09:49:27,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407885261] [2021-10-28 09:49:27,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-10-28 09:49:27,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-10-28 09:49:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2021-10-28 09:49:27,191 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:30,839 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2021-10-28 09:49:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-10-28 09:49:30,840 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-10-28 09:49:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:30,840 INFO L225 Difference]: With dead ends: 113 [2021-10-28 09:49:30,840 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 09:49:30,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=213, Invalid=10917, Unknown=0, NotChecked=0, Total=11130 [2021-10-28 09:49:30,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 09:49:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-10-28 09:49:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-10-28 09:49:30,847 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2021-10-28 09:49:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:30,847 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-10-28 09:49:30,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-10-28 09:49:30,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-10-28 09:49:30,848 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:30,848 INFO L513 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:30,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:31,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-10-28 09:49:31,061 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:49:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash 288224019, now seen corresponding path program 101 times [2021-10-28 09:49:31,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:31,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675928395] [2021-10-28 09:49:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:31,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:35,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:35,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675928395] [2021-10-28 09:49:35,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675928395] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:35,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:35,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-10-28 09:49:35,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719580203] [2021-10-28 09:49:35,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-10-28 09:49:35,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-10-28 09:49:35,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-10-28 09:49:35,136 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:35,447 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-10-28 09:49:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-10-28 09:49:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-10-28 09:49:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:35,448 INFO L225 Difference]: With dead ends: 109 [2021-10-28 09:49:35,448 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:49:35,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-10-28 09:49:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:49:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:49:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:49:35,449 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2021-10-28 09:49:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:35,449 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:49:35,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:49:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:49:35,450 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:49:35,451 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:49:35,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-10-28 09:49:35,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:49:35,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:49:35,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:49:37,102 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:49:37,104 INFO L853 garLoopResultBuilder]: At program point L23-2(lines 23 26) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~i~0 32) (<= ULTIMATE.start_main_~j~0 64) (<= 64 ULTIMATE.start_main_~j~0) (<= 32 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 67) (<= 67 ULTIMATE.start_main_~i~0) (<= 134 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 134)) (and (<= ULTIMATE.start_main_~i~0 24) (<= 48 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 48) (<= 24 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 98) (<= 98 ULTIMATE.start_main_~i~0) (<= 196 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 196)) (and (<= 38 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 38) (<= 19 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 19)) (and (<= 8 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 16) (<= ULTIMATE.start_main_~i~0 8) (<= 16 ULTIMATE.start_main_~j~0)) (and (<= 114 ULTIMATE.start_main_~j~0) (<= 57 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 114) (<= ULTIMATE.start_main_~i~0 57)) (and (<= ULTIMATE.start_main_~j~0 128) (<= 128 ULTIMATE.start_main_~j~0) (<= 64 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 64)) (and (<= ULTIMATE.start_main_~j~0 52) (<= 26 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 26) (<= 52 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 178) (<= 178 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 89) (<= 89 ULTIMATE.start_main_~i~0)) (and (<= 28 ULTIMATE.start_main_~j~0) (<= 14 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 28) (<= ULTIMATE.start_main_~i~0 14)) (and (<= 192 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 96) (<= ULTIMATE.start_main_~j~0 192) (<= 96 ULTIMATE.start_main_~i~0)) (and (<= 60 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 60) (<= ULTIMATE.start_main_~j~0 120) (<= 120 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 69) (<= ULTIMATE.start_main_~j~0 138) (<= 69 ULTIMATE.start_main_~i~0) (<= 138 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 172) (<= ULTIMATE.start_main_~i~0 86) (<= 86 ULTIMATE.start_main_~i~0) (<= 172 ULTIMATE.start_main_~j~0)) (and (<= 148 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 74) (<= ULTIMATE.start_main_~j~0 148) (<= 74 ULTIMATE.start_main_~i~0)) (and (<= 136 ULTIMATE.start_main_~j~0) (<= 68 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 68) (<= ULTIMATE.start_main_~j~0 136)) (and (<= ULTIMATE.start_main_~j~0 20) (<= ULTIMATE.start_main_~i~0 10) (<= 10 ULTIMATE.start_main_~i~0) (<= 20 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 46) (<= 92 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 92) (<= 46 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 102) (<= 102 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 51) (<= 51 ULTIMATE.start_main_~i~0)) (and (<= 56 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 56) (<= ULTIMATE.start_main_~j~0 112) (<= 112 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 108) (<= ULTIMATE.start_main_~i~0 54) (<= 108 ULTIMATE.start_main_~j~0) (<= 54 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 44) (<= ULTIMATE.start_main_~j~0 88) (<= 44 ULTIMATE.start_main_~i~0) (<= 88 ULTIMATE.start_main_~j~0)) (and (<= 75 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 150) (<= ULTIMATE.start_main_~i~0 75) (<= 150 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 91) (<= 182 ULTIMATE.start_main_~j~0) (<= 91 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 182)) (and (<= 6 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 12) (<= ULTIMATE.start_main_~i~0 6) (<= 12 ULTIMATE.start_main_~j~0)) (and (<= 194 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 194) (<= 97 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 97)) (and (<= 188 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 94) (<= ULTIMATE.start_main_~j~0 188) (<= 94 ULTIMATE.start_main_~i~0)) (and (<= 180 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 180) (<= 90 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 90)) (and (<= 5 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 5) (<= ULTIMATE.start_main_~j~0 10) (<= 10 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 84) (<= 84 ULTIMATE.start_main_~j~0) (<= 42 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 42)) (and (<= ULTIMATE.start_main_~i~0 11) (<= 22 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 22) (<= 11 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 84) (<= 168 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 168) (<= 84 ULTIMATE.start_main_~i~0)) (and (<= 66 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 33) (<= ULTIMATE.start_main_~j~0 66) (<= 33 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 85) (<= ULTIMATE.start_main_~j~0 170) (<= 85 ULTIMATE.start_main_~i~0) (<= 170 ULTIMATE.start_main_~j~0)) (and (<= 34 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 17) (<= ULTIMATE.start_main_~j~0 34) (<= 17 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 122) (<= 61 ULTIMATE.start_main_~i~0) (<= 122 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 61)) (and (<= 72 ULTIMATE.start_main_~j~0) (<= 36 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 72) (<= ULTIMATE.start_main_~i~0 36)) (and (<= 174 ULTIMATE.start_main_~j~0) (<= 87 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 87) (<= ULTIMATE.start_main_~j~0 174)) (and (<= ULTIMATE.start_main_~i~0 70) (<= 140 ULTIMATE.start_main_~j~0) (<= 70 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 140)) (and (<= 38 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 38) (<= ULTIMATE.start_main_~j~0 76) (<= 76 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 14) (<= ULTIMATE.start_main_~i~0 7) (<= 14 ULTIMATE.start_main_~j~0) (<= 7 ULTIMATE.start_main_~i~0)) (and (<= 82 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 82) (<= 164 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 164)) (and (<= 73 ULTIMATE.start_main_~i~0) (<= 146 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 73) (<= ULTIMATE.start_main_~j~0 146)) (and (<= ULTIMATE.start_main_~i~0 1) (<= 2 ULTIMATE.start_main_~j~0) (<= 1 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 2)) (and (<= ULTIMATE.start_main_~j~0 26) (<= 13 ULTIMATE.start_main_~i~0) (<= 26 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 13)) (and (<= 2 ULTIMATE.start_main_~i~0) (<= 4 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~j~0 4)) (and (<= 130 ULTIMATE.start_main_~j~0) (<= 65 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 65) (<= ULTIMATE.start_main_~j~0 130)) (and (<= ULTIMATE.start_main_~j~0 142) (<= 142 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 71) (<= 71 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 110) (<= 110 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 55) (<= 55 ULTIMATE.start_main_~i~0)) (and (<= 190 ULTIMATE.start_main_~j~0) (<= 95 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 95) (<= ULTIMATE.start_main_~j~0 190)) (and (<= 24 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 24) (<= ULTIMATE.start_main_~i~0 12) (<= 12 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 86) (<= 86 ULTIMATE.start_main_~j~0) (<= 43 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 43)) (and (<= ULTIMATE.start_main_~i~0 34) (<= 34 ULTIMATE.start_main_~i~0) (<= 68 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 68)) (and (<= ULTIMATE.start_main_~i~0 20) (<= 20 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 40) (<= 40 ULTIMATE.start_main_~j~0)) (and (<= 41 ULTIMATE.start_main_~i~0) (<= 82 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 41) (<= ULTIMATE.start_main_~j~0 82)) (and (<= ULTIMATE.start_main_~j~0 106) (<= ULTIMATE.start_main_~i~0 53) (<= 53 ULTIMATE.start_main_~i~0) (<= 106 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 50) (<= ULTIMATE.start_main_~j~0 100) (<= 100 ULTIMATE.start_main_~j~0) (<= 50 ULTIMATE.start_main_~i~0)) (and (<= 45 ULTIMATE.start_main_~i~0) (<= 90 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 90) (<= ULTIMATE.start_main_~i~0 45)) (and (<= ULTIMATE.start_main_~j~0 62) (<= 31 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 31) (<= 62 ULTIMATE.start_main_~j~0)) (and (<= 80 ULTIMATE.start_main_~i~0) (<= 160 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 160) (<= ULTIMATE.start_main_~i~0 80)) (and (<= 32 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 16) (<= ULTIMATE.start_main_~j~0 32) (<= 16 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 79) (<= 158 ULTIMATE.start_main_~j~0) (<= 79 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 158)) (and (<= ULTIMATE.start_main_~j~0 74) (<= ULTIMATE.start_main_~i~0 37) (<= 74 ULTIMATE.start_main_~j~0) (<= 37 ULTIMATE.start_main_~i~0)) (and (<= 154 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 77) (<= 77 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 154)) (and (<= 80 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 80) (<= 40 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 40)) (and (<= 3 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 6) (<= ULTIMATE.start_main_~i~0 3) (<= 6 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 78) (<= ULTIMATE.start_main_~j~0 156) (<= 156 ULTIMATE.start_main_~j~0) (<= 78 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 42) (<= 42 ULTIMATE.start_main_~j~0) (<= 21 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 21)) (and (<= ULTIMATE.start_main_~j~0 116) (<= 116 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 58) (<= 58 ULTIMATE.start_main_~i~0)) (and (<= 162 ULTIMATE.start_main_~j~0) (<= 81 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 81) (<= ULTIMATE.start_main_~j~0 162)) (and (<= ULTIMATE.start_main_~i~0 29) (<= 58 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 58) (<= 29 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 83) (<= 83 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 166) (<= 166 ULTIMATE.start_main_~j~0)) (and (<= 96 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 96) (<= 48 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 48)) (and (<= ULTIMATE.start_main_~j~0 186) (<= 186 ULTIMATE.start_main_~j~0) (<= 93 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 93)) (and (<= 44 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 22) (<= ULTIMATE.start_main_~j~0 44) (<= 22 ULTIMATE.start_main_~i~0)) (and (<= 46 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 46) (<= 23 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 23)) (and (<= 36 ULTIMATE.start_main_~j~0) (<= 18 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 36) (<= ULTIMATE.start_main_~i~0 18)) (and (<= ULTIMATE.start_main_~j~0 70) (<= ULTIMATE.start_main_~i~0 35) (<= 35 ULTIMATE.start_main_~i~0) (<= 70 ULTIMATE.start_main_~j~0)) (and (<= 78 ULTIMATE.start_main_~j~0) (<= 39 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 39) (<= ULTIMATE.start_main_~j~0 78)) (and (<= 54 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 27) (<= 27 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 54)) (and (<= ULTIMATE.start_main_~i~0 66) (<= 132 ULTIMATE.start_main_~j~0) (<= 66 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 132)) (and (<= 15 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 15) (<= 30 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 30)) (and (<= 144 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 144) (<= 72 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 72)) (and (<= ULTIMATE.start_main_~j~0 184) (<= ULTIMATE.start_main_~i~0 92) (<= 184 ULTIMATE.start_main_~j~0) (<= 92 ULTIMATE.start_main_~i~0)) (and (<= 49 ULTIMATE.start_main_~i~0) (<= 98 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 98) (<= ULTIMATE.start_main_~i~0 49)) (and (<= ULTIMATE.start_main_~i~0 76) (<= ULTIMATE.start_main_~j~0 152) (<= 152 ULTIMATE.start_main_~j~0) (<= 76 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 126) (<= ULTIMATE.start_main_~i~0 63) (<= 63 ULTIMATE.start_main_~i~0) (<= 126 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 0) (<= 0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 0) (<= 0 ULTIMATE.start_main_~j~0)) (and (<= 118 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 59) (<= 59 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 118)) (and (<= ULTIMATE.start_main_~i~0 88) (<= 88 ULTIMATE.start_main_~i~0) (<= 176 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 176)) (and (<= 4 ULTIMATE.start_main_~i~0) (<= 8 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 8) (<= ULTIMATE.start_main_~i~0 4)) (and (<= 104 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 104) (<= 52 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 52)) (and (<= 50 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 50) (<= ULTIMATE.start_main_~i~0 25) (<= 25 ULTIMATE.start_main_~i~0)) (and (<= 198 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 99) (<= ULTIMATE.start_main_~j~0 198) (<= 99 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 28) (<= 28 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 56) (<= 56 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 9) (<= 18 ULTIMATE.start_main_~j~0) (<= 9 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 18)) (and (<= 30 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 30) (<= 60 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 60)) (and (<= 94 ULTIMATE.start_main_~j~0) (<= 47 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 94) (<= ULTIMATE.start_main_~i~0 47)) (and (< 199 ULTIMATE.start_main_~j~0) (<= 100 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 200)) (and (<= 62 ULTIMATE.start_main_~i~0) (<= 124 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 124) (<= ULTIMATE.start_main_~i~0 62))) [2021-10-28 09:49:37,105 INFO L857 garLoopResultBuilder]: For program point L23-3(lines 23 26) no Hoare annotation was computed. [2021-10-28 09:49:37,105 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-28 09:49:37,105 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:49:37,105 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:49:37,105 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:49:37,106 INFO L860 garLoopResultBuilder]: At program point L28(lines 19 29) the Hoare annotation is: true [2021-10-28 09:49:37,106 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-28 09:49:37,106 INFO L857 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2021-10-28 09:49:37,106 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-28 09:49:37,106 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-10-28 09:49:37,109 INFO L731 BasicCegarLoop]: Path program histogram: [101, 1, 1] [2021-10-28 09:49:37,110 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:49:37,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:49:37 BoogieIcfgContainer [2021-10-28 09:49:37,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:49:37,163 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:49:37,163 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:49:37,164 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:49:37,164 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:44:54" (3/4) ... [2021-10-28 09:49:37,167 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:49:37,176 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 09:49:37,176 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:49:37,177 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:49:37,177 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:49:37,211 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:49:37,211 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:49:37,213 INFO L168 Benchmark]: Toolchain (without parser) took 283956.54 ms. Allocated memory was 90.2 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 55.5 MB in the beginning and 232.1 MB in the end (delta: -176.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-28 09:49:37,213 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 66.7 MB in the beginning and 66.7 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:49:37,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.48 ms. Allocated memory is still 90.2 MB. Free memory was 55.3 MB in the beginning and 66.9 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:49:37,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.71 ms. Allocated memory is still 90.2 MB. Free memory was 66.9 MB in the beginning and 65.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:49:37,214 INFO L168 Benchmark]: Boogie Preprocessor took 22.01 ms. Allocated memory is still 90.2 MB. Free memory was 65.5 MB in the beginning and 64.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:49:37,215 INFO L168 Benchmark]: RCFGBuilder took 402.44 ms. Allocated memory is still 90.2 MB. Free memory was 64.3 MB in the beginning and 55.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:49:37,215 INFO L168 Benchmark]: TraceAbstraction took 283155.50 ms. Allocated memory was 90.2 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 55.1 MB in the beginning and 235.2 MB in the end (delta: -180.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-28 09:49:37,215 INFO L168 Benchmark]: Witness Printer took 48.25 ms. Allocated memory is still 1.5 GB. Free memory was 235.2 MB in the beginning and 232.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:49:37,217 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 90.2 MB. Free memory was 66.7 MB in the beginning and 66.7 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 283.48 ms. Allocated memory is still 90.2 MB. Free memory was 55.3 MB in the beginning and 66.9 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.71 ms. Allocated memory is still 90.2 MB. Free memory was 66.9 MB in the beginning and 65.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.01 ms. Allocated memory is still 90.2 MB. Free memory was 65.5 MB in the beginning and 64.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 402.44 ms. Allocated memory is still 90.2 MB. Free memory was 64.3 MB in the beginning and 55.6 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 283155.50 ms. Allocated memory was 90.2 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 55.1 MB in the beginning and 235.2 MB in the end (delta: -180.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. * Witness Printer took 48.25 ms. Allocated memory is still 1.5 GB. Free memory was 235.2 MB in the beginning and 232.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 283.0s, OverallIterations: 103, TraceHistogramMax: 101, PathProgramHistogramMax: 101, EmptinessCheckTime: 0.0s, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 722 SDtfs, 1 SDslu, 2273 SDs, 0 SdLazy, 17320 SolverSat, 420 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11211 GetRequests, 5954 SyntacticMatches, 2 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=102, InterpolantAutomatonStates: 5459, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 103 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 104 NumberOfFragments, 1312 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 165.7s InterpolantComputationTime, 11622 NumberOfCodeBlocks, 11622 NumberOfCodeBlocksAsserted, 1495 NumberOfCheckSat, 11419 ConstructedInterpolants, 0 QuantifiedInterpolants, 33048 SizeOfPredicates, 2 NumberOfNonLiveVariables, 29750 ConjunctsInSsa, 5353 ConjunctsInUnsatCore, 203 InterpolantComputations, 3 PerfectInterpolantSequences, 5151/348551 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((i <= 32 && j <= 64) && 64 <= j) && 32 <= i) || (((i <= 67 && 67 <= i) && 134 <= j) && j <= 134)) || (((i <= 24 && 48 <= j) && j <= 48) && 24 <= i)) || (((i <= 98 && 98 <= i) && 196 <= j) && j <= 196)) || (((38 <= j && j <= 38) && 19 <= i) && i <= 19)) || (((8 <= i && j <= 16) && i <= 8) && 16 <= j)) || (((114 <= j && 57 <= i) && j <= 114) && i <= 57)) || (((j <= 128 && 128 <= j) && 64 <= i) && i <= 64)) || (((j <= 52 && 26 <= i) && i <= 26) && 52 <= j)) || (((j <= 178 && 178 <= j) && i <= 89) && 89 <= i)) || (((28 <= j && 14 <= i) && j <= 28) && i <= 14)) || (((192 <= j && i <= 96) && j <= 192) && 96 <= i)) || (((60 <= i && i <= 60) && j <= 120) && 120 <= j)) || (((i <= 69 && j <= 138) && 69 <= i) && 138 <= j)) || (((j <= 172 && i <= 86) && 86 <= i) && 172 <= j)) || (((148 <= j && i <= 74) && j <= 148) && 74 <= i)) || (((136 <= j && 68 <= i) && i <= 68) && j <= 136)) || (((j <= 20 && i <= 10) && 10 <= i) && 20 <= j)) || (((i <= 46 && 92 <= j) && j <= 92) && 46 <= i)) || (((j <= 102 && 102 <= j) && i <= 51) && 51 <= i)) || (((56 <= i && i <= 56) && j <= 112) && 112 <= j)) || (((j <= 108 && i <= 54) && 108 <= j) && 54 <= i)) || (((i <= 44 && j <= 88) && 44 <= i) && 88 <= j)) || (((75 <= i && j <= 150) && i <= 75) && 150 <= j)) || (((i <= 91 && 182 <= j) && 91 <= i) && j <= 182)) || (((6 <= i && j <= 12) && i <= 6) && 12 <= j)) || (((194 <= j && j <= 194) && 97 <= i) && i <= 97)) || (((188 <= j && i <= 94) && j <= 188) && 94 <= i)) || (((180 <= j && j <= 180) && 90 <= i) && i <= 90)) || (((5 <= i && i <= 5) && j <= 10) && 10 <= j)) || (((j <= 84 && 84 <= j) && 42 <= i) && i <= 42)) || (((i <= 11 && 22 <= j) && j <= 22) && 11 <= i)) || (((i <= 84 && 168 <= j) && j <= 168) && 84 <= i)) || (((66 <= j && i <= 33) && j <= 66) && 33 <= i)) || (((i <= 85 && j <= 170) && 85 <= i) && 170 <= j)) || (((34 <= j && i <= 17) && j <= 34) && 17 <= i)) || (((j <= 122 && 61 <= i) && 122 <= j) && i <= 61)) || (((72 <= j && 36 <= i) && j <= 72) && i <= 36)) || (((174 <= j && 87 <= i) && i <= 87) && j <= 174)) || (((i <= 70 && 140 <= j) && 70 <= i) && j <= 140)) || (((38 <= i && i <= 38) && j <= 76) && 76 <= j)) || (((j <= 14 && i <= 7) && 14 <= j) && 7 <= i)) || (((82 <= i && i <= 82) && 164 <= j) && j <= 164)) || (((73 <= i && 146 <= j) && i <= 73) && j <= 146)) || (((i <= 1 && 2 <= j) && 1 <= i) && j <= 2)) || (((j <= 26 && 13 <= i) && 26 <= j) && i <= 13)) || (((2 <= i && 4 <= j) && i <= 2) && j <= 4)) || (((130 <= j && 65 <= i) && i <= 65) && j <= 130)) || (((j <= 142 && 142 <= j) && i <= 71) && 71 <= i)) || (((j <= 110 && 110 <= j) && i <= 55) && 55 <= i)) || (((190 <= j && 95 <= i) && i <= 95) && j <= 190)) || (((24 <= j && j <= 24) && i <= 12) && 12 <= i)) || (((j <= 86 && 86 <= j) && 43 <= i) && i <= 43)) || (((i <= 34 && 34 <= i) && 68 <= j) && j <= 68)) || (((i <= 20 && 20 <= i) && j <= 40) && 40 <= j)) || (((41 <= i && 82 <= j) && i <= 41) && j <= 82)) || (((j <= 106 && i <= 53) && 53 <= i) && 106 <= j)) || (((i <= 50 && j <= 100) && 100 <= j) && 50 <= i)) || (((45 <= i && 90 <= j) && j <= 90) && i <= 45)) || (((j <= 62 && 31 <= i) && i <= 31) && 62 <= j)) || (((80 <= i && 160 <= j) && j <= 160) && i <= 80)) || (((32 <= j && i <= 16) && j <= 32) && 16 <= i)) || (((i <= 79 && 158 <= j) && 79 <= i) && j <= 158)) || (((j <= 74 && i <= 37) && 74 <= j) && 37 <= i)) || (((154 <= j && i <= 77) && 77 <= i) && j <= 154)) || (((80 <= j && j <= 80) && 40 <= i) && i <= 40)) || (((3 <= i && j <= 6) && i <= 3) && 6 <= j)) || (((i <= 78 && j <= 156) && 156 <= j) && 78 <= i)) || (((j <= 42 && 42 <= j) && 21 <= i) && i <= 21)) || (((j <= 116 && 116 <= j) && i <= 58) && 58 <= i)) || (((162 <= j && 81 <= i) && i <= 81) && j <= 162)) || (((i <= 29 && 58 <= j) && j <= 58) && 29 <= i)) || (((i <= 83 && 83 <= i) && j <= 166) && 166 <= j)) || (((96 <= j && j <= 96) && 48 <= i) && i <= 48)) || (((j <= 186 && 186 <= j) && 93 <= i) && i <= 93)) || (((44 <= j && i <= 22) && j <= 44) && 22 <= i)) || (((46 <= j && j <= 46) && 23 <= i) && i <= 23)) || (((36 <= j && 18 <= i) && j <= 36) && i <= 18)) || (((j <= 70 && i <= 35) && 35 <= i) && 70 <= j)) || (((78 <= j && 39 <= i) && i <= 39) && j <= 78)) || (((54 <= j && i <= 27) && 27 <= i) && j <= 54)) || (((i <= 66 && 132 <= j) && 66 <= i) && j <= 132)) || (((15 <= i && i <= 15) && 30 <= j) && j <= 30)) || (((144 <= j && j <= 144) && 72 <= i) && i <= 72)) || (((j <= 184 && i <= 92) && 184 <= j) && 92 <= i)) || (((49 <= i && 98 <= j) && j <= 98) && i <= 49)) || (((i <= 76 && j <= 152) && 152 <= j) && 76 <= i)) || (((j <= 126 && i <= 63) && 63 <= i) && 126 <= j)) || (((j <= 0 && 0 <= i) && i <= 0) && 0 <= j)) || (((118 <= j && i <= 59) && 59 <= i) && j <= 118)) || (((i <= 88 && 88 <= i) && 176 <= j) && j <= 176)) || (((4 <= i && 8 <= j) && j <= 8) && i <= 4)) || (((104 <= j && j <= 104) && 52 <= i) && i <= 52)) || (((50 <= j && j <= 50) && i <= 25) && 25 <= i)) || (((198 <= j && i <= 99) && j <= 198) && 99 <= i)) || (((i <= 28 && 28 <= i) && j <= 56) && 56 <= j)) || (((i <= 9 && 18 <= j) && 9 <= i) && j <= 18)) || (((30 <= i && i <= 30) && 60 <= j) && j <= 60)) || (((94 <= j && 47 <= i) && j <= 94) && i <= 47)) || ((199 < j && 100 <= i) && j <= 200)) || (((62 <= i && 124 <= j) && j <= 124) && i <= 62) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-28 09:49:37,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dec4d8a-dbbc-49a9-b436-abacb98c308a/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...