./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c -s /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer --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 9aa4eed507109801754e8007929fb4ed79ffe649 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 14:53:35,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 14:53:35,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 14:53:35,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 14:53:35,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 14:53:35,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 14:53:35,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 14:53:35,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 14:53:35,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 14:53:35,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 14:53:35,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 14:53:35,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 14:53:35,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 14:53:35,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 14:53:35,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 14:53:35,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 14:53:35,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 14:53:35,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 14:53:35,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 14:53:35,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 14:53:35,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 14:53:35,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 14:53:35,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 14:53:35,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 14:53:35,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 14:53:35,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 14:53:35,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 14:53:35,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 14:53:35,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 14:53:35,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 14:53:35,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 14:53:35,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 14:53:35,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 14:53:35,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 14:53:35,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 14:53:35,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 14:53:35,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 14:53:35,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 14:53:35,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 14:53:35,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 14:53:35,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 14:53:35,807 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 14:53:35,860 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 14:53:35,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 14:53:35,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 14:53:35,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 14:53:35,866 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 14:53:35,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 14:53:35,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 14:53:35,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 14:53:35,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 14:53:35,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 14:53:35,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 14:53:35,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 14:53:35,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 14:53:35,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 14:53:35,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 14:53:35,870 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 14:53:35,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 14:53:35,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 14:53:35,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 14:53:35,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 14:53:35,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 14:53:35,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 14:53:35,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 14:53:35,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 14:53:35,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 14:53:35,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 14:53:35,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 14:53:35,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 14:53:35,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 14:53:35,874 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-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa4eed507109801754e8007929fb4ed79ffe649 [2020-12-01 14:53:36,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 14:53:36,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 14:53:36,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 14:53:36,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 14:53:36,152 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 14:53:36,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2020-12-01 14:53:36,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/data/7a1c97bf1/d3ed394ff5e245e5a22ef5bc214975b1/FLAG6ba1a584f [2020-12-01 14:53:36,668 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 14:53:36,668 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2020-12-01 14:53:36,674 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/data/7a1c97bf1/d3ed394ff5e245e5a22ef5bc214975b1/FLAG6ba1a584f [2020-12-01 14:53:37,054 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/data/7a1c97bf1/d3ed394ff5e245e5a22ef5bc214975b1 [2020-12-01 14:53:37,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 14:53:37,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 14:53:37,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 14:53:37,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 14:53:37,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 14:53:37,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db68c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37, skipping insertion in model container [2020-12-01 14:53:37,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 14:53:37,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 14:53:37,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:53:37,277 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 14:53:37,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:53:37,329 INFO L208 MainTranslator]: Completed translation [2020-12-01 14:53:37,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37 WrapperNode [2020-12-01 14:53:37,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 14:53:37,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 14:53:37,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 14:53:37,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 14:53:37,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 14:53:37,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 14:53:37,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 14:53:37,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 14:53:37,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... [2020-12-01 14:53:37,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 14:53:37,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 14:53:37,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 14:53:37,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 14:53:37,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 14:53:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 14:53:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 14:53:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 14:53:37,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 14:53:37,690 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 14:53:37,690 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-01 14:53:37,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:53:37 BoogieIcfgContainer [2020-12-01 14:53:37,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 14:53:37,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 14:53:37,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 14:53:37,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 14:53:37,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 02:53:37" (1/3) ... [2020-12-01 14:53:37,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70670c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:53:37, skipping insertion in model container [2020-12-01 14:53:37,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:53:37" (2/3) ... [2020-12-01 14:53:37,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70670c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:53:37, skipping insertion in model container [2020-12-01 14:53:37,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:53:37" (3/3) ... [2020-12-01 14:53:37,718 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2020-12-01 14:53:37,730 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 14:53:37,733 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-01 14:53:37,743 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-01 14:53:37,765 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 14:53:37,765 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 14:53:37,766 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 14:53:37,766 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 14:53:37,766 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 14:53:37,766 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 14:53:37,766 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 14:53:37,766 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 14:53:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-01 14:53:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 14:53:37,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:37,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:37,798 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:37,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1235309937, now seen corresponding path program 1 times [2020-12-01 14:53:37,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:37,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052615662] [2020-12-01 14:53:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:53:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:38,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052615662] [2020-12-01 14:53:38,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:53:38,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 14:53:38,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141619522] [2020-12-01 14:53:38,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 14:53:38,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:38,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 14:53:38,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 14:53:38,031 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-01 14:53:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:38,053 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-01 14:53:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 14:53:38,054 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-01 14:53:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:38,062 INFO L225 Difference]: With dead ends: 39 [2020-12-01 14:53:38,062 INFO L226 Difference]: Without dead ends: 17 [2020-12-01 14:53:38,065 INFO L677 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 [2020-12-01 14:53:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-01 14:53:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-01 14:53:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-01 14:53:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-01 14:53:38,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-01 14:53:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:38,097 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-01 14:53:38,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 14:53:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-01 14:53:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 14:53:38,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:38,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:38,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 14:53:38,099 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:38,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-12-01 14:53:38,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:38,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054003531] [2020-12-01 14:53:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:38,130 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:38,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412971233] [2020-12-01 14:53:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:53:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-01 14:53:38,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:38,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054003531] [2020-12-01 14:53:38,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:38,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412971233] [2020-12-01 14:53:38,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:53:38,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-01 14:53:38,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443534333] [2020-12-01 14:53:38,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 14:53:38,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 14:53:38,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 14:53:38,443 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-01 14:53:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:38,759 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-01 14:53:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 14:53:38,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-01 14:53:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:38,763 INFO L225 Difference]: With dead ends: 32 [2020-12-01 14:53:38,763 INFO L226 Difference]: Without dead ends: 30 [2020-12-01 14:53:38,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-12-01 14:53:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-01 14:53:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-01 14:53:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-01 14:53:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-01 14:53:38,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-12-01 14:53:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:38,778 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-01 14:53:38,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 14:53:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-01 14:53:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 14:53:38,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:38,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:38,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 14:53:38,997 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1507423092, now seen corresponding path program 1 times [2020-12-01 14:53:38,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:38,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429152528] [2020-12-01 14:53:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:39,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:39,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458914363] [2020-12-01 14:53:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:53:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 14:53:39,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:39,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429152528] [2020-12-01 14:53:39,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:39,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458914363] [2020-12-01 14:53:39,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:53:39,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 14:53:39,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419486653] [2020-12-01 14:53:39,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:53:39,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:53:39,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:53:39,129 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-01 14:53:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:39,150 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-01 14:53:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:53:39,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-01 14:53:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:39,153 INFO L225 Difference]: With dead ends: 24 [2020-12-01 14:53:39,153 INFO L226 Difference]: Without dead ends: 20 [2020-12-01 14:53:39,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:53:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-01 14:53:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-01 14:53:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-01 14:53:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-01 14:53:39,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-12-01 14:53:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:39,162 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-01 14:53:39,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:53:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-01 14:53:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 14:53:39,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:39,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:39,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:39,380 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1188504123, now seen corresponding path program 1 times [2020-12-01 14:53:39,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:39,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537504693] [2020-12-01 14:53:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:39,395 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:39,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494821221] [2020-12-01 14:53:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:53:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-01 14:53:39,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537504693] [2020-12-01 14:53:39,563 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494821221] [2020-12-01 14:53:39,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:53:39,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-01 14:53:39,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389704255] [2020-12-01 14:53:39,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 14:53:39,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:39,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 14:53:39,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:53:39,565 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-01 14:53:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:39,706 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-01 14:53:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 14:53:39,706 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-01 14:53:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:39,707 INFO L225 Difference]: With dead ends: 24 [2020-12-01 14:53:39,707 INFO L226 Difference]: Without dead ends: 18 [2020-12-01 14:53:39,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-01 14:53:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-01 14:53:39,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-01 14:53:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-01 14:53:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-01 14:53:39,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-12-01 14:53:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:39,712 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-01 14:53:39,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 14:53:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-01 14:53:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 14:53:39,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:39,712 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:39,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:39,941 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1768635143, now seen corresponding path program 1 times [2020-12-01 14:53:39,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:39,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035640500] [2020-12-01 14:53:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:39,962 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:39,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507083322] [2020-12-01 14:53:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:53:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 14:53:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:40,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035640500] [2020-12-01 14:53:40,074 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:40,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507083322] [2020-12-01 14:53:40,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:40,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-01 14:53:40,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203830491] [2020-12-01 14:53:40,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 14:53:40,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:40,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 14:53:40,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 14:53:40,076 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-12-01 14:53:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:40,103 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-01 14:53:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 14:53:40,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-01 14:53:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:40,104 INFO L225 Difference]: With dead ends: 26 [2020-12-01 14:53:40,104 INFO L226 Difference]: Without dead ends: 22 [2020-12-01 14:53:40,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 14:53:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-01 14:53:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-01 14:53:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-01 14:53:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-01 14:53:40,109 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-12-01 14:53:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:40,109 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-01 14:53:40,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 14:53:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-01 14:53:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-01 14:53:40,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:40,110 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:40,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:40,337 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash 71944364, now seen corresponding path program 2 times [2020-12-01 14:53:40,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:40,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136449720] [2020-12-01 14:53:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:40,360 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:40,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434054246] [2020-12-01 14:53:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:40,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:53:40,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:40,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 14:53:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136449720] [2020-12-01 14:53:40,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434054246] [2020-12-01 14:53:40,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:40,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-01 14:53:40,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726319394] [2020-12-01 14:53:40,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 14:53:40,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:40,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 14:53:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 14:53:40,483 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-12-01 14:53:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:40,521 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-01 14:53:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 14:53:40,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-01 14:53:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:40,522 INFO L225 Difference]: With dead ends: 31 [2020-12-01 14:53:40,522 INFO L226 Difference]: Without dead ends: 27 [2020-12-01 14:53:40,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-01 14:53:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-01 14:53:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-01 14:53:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-01 14:53:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-01 14:53:40,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-12-01 14:53:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:40,529 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-01 14:53:40,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 14:53:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-01 14:53:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-01 14:53:40,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:40,530 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:40,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-01 14:53:40,741 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash 800201945, now seen corresponding path program 3 times [2020-12-01 14:53:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:40,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792541024] [2020-12-01 14:53:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:40,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:40,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945712948] [2020-12-01 14:53:40,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:40,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-01 14:53:40,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:40,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-01 14:53:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:40,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792541024] [2020-12-01 14:53:40,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:40,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945712948] [2020-12-01 14:53:40,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:40,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-01 14:53:40,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144316660] [2020-12-01 14:53:40,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 14:53:40,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:40,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 14:53:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-01 14:53:40,936 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-12-01 14:53:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:40,987 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-01 14:53:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 14:53:40,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-01 14:53:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:40,988 INFO L225 Difference]: With dead ends: 36 [2020-12-01 14:53:40,988 INFO L226 Difference]: Without dead ends: 32 [2020-12-01 14:53:40,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-01 14:53:40,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-01 14:53:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-01 14:53:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-01 14:53:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-01 14:53:40,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-12-01 14:53:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:40,996 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-01 14:53:40,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 14:53:40,996 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-01 14:53:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-01 14:53:40,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:40,997 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:41,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:41,225 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1993843508, now seen corresponding path program 4 times [2020-12-01 14:53:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:41,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330360929] [2020-12-01 14:53:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:41,237 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:41,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179733898] [2020-12-01 14:53:41,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:41,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:53:41,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:41,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 14:53:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:41,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330360929] [2020-12-01 14:53:41,427 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:41,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179733898] [2020-12-01 14:53:41,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:41,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 14:53:41,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517289426] [2020-12-01 14:53:41,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 14:53:41,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:41,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 14:53:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-01 14:53:41,432 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-01 14:53:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:41,519 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-01 14:53:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 14:53:41,520 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-01 14:53:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:41,522 INFO L225 Difference]: With dead ends: 41 [2020-12-01 14:53:41,522 INFO L226 Difference]: Without dead ends: 37 [2020-12-01 14:53:41,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-01 14:53:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-01 14:53:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-01 14:53:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-01 14:53:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-01 14:53:41,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-12-01 14:53:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:41,536 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-01 14:53:41,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 14:53:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-01 14:53:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-01 14:53:41,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:41,536 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:41,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:41,737 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash -915727175, now seen corresponding path program 5 times [2020-12-01 14:53:41,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:41,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755514344] [2020-12-01 14:53:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:41,749 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787230311] [2020-12-01 14:53:41,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:41,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-01 14:53:41,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:41,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-01 14:53:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:41,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755514344] [2020-12-01 14:53:41,948 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:41,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787230311] [2020-12-01 14:53:41,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:41,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-01 14:53:41,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346777901] [2020-12-01 14:53:41,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 14:53:41,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:41,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 14:53:41,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:53:41,954 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-12-01 14:53:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:42,052 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-01 14:53:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-01 14:53:42,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-12-01 14:53:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:42,053 INFO L225 Difference]: With dead ends: 46 [2020-12-01 14:53:42,053 INFO L226 Difference]: Without dead ends: 42 [2020-12-01 14:53:42,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-01 14:53:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-01 14:53:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-01 14:53:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-01 14:53:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-01 14:53:42,060 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2020-12-01 14:53:42,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:42,061 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-01 14:53:42,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 14:53:42,061 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-01 14:53:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-01 14:53:42,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:42,067 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:42,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-01 14:53:42,289 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -462141204, now seen corresponding path program 6 times [2020-12-01 14:53:42,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:42,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644761076] [2020-12-01 14:53:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:42,298 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:42,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881980376] [2020-12-01 14:53:42,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:42,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-01 14:53:42,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:42,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-01 14:53:42,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:42,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644761076] [2020-12-01 14:53:42,500 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:42,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881980376] [2020-12-01 14:53:42,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:42,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-01 14:53:42,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514626800] [2020-12-01 14:53:42,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 14:53:42,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 14:53:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-01 14:53:42,502 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-12-01 14:53:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:42,600 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-12-01 14:53:42,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 14:53:42,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-12-01 14:53:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:42,601 INFO L225 Difference]: With dead ends: 51 [2020-12-01 14:53:42,601 INFO L226 Difference]: Without dead ends: 47 [2020-12-01 14:53:42,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-12-01 14:53:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-01 14:53:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-01 14:53:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-01 14:53:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-01 14:53:42,609 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2020-12-01 14:53:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:42,609 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-01 14:53:42,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 14:53:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-01 14:53:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-01 14:53:42,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:42,611 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:42,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:42,827 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:42,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1286749031, now seen corresponding path program 7 times [2020-12-01 14:53:42,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:42,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60316304] [2020-12-01 14:53:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:42,838 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:42,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832137353] [2020-12-01 14:53:42,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:53:42,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-01 14:53:42,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:43,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60316304] [2020-12-01 14:53:43,062 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:43,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832137353] [2020-12-01 14:53:43,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:43,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-01 14:53:43,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94120919] [2020-12-01 14:53:43,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 14:53:43,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 14:53:43,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-01 14:53:43,064 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 11 states. [2020-12-01 14:53:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:43,178 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-01 14:53:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-01 14:53:43,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-01 14:53:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:43,179 INFO L225 Difference]: With dead ends: 56 [2020-12-01 14:53:43,179 INFO L226 Difference]: Without dead ends: 52 [2020-12-01 14:53:43,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-12-01 14:53:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-01 14:53:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-01 14:53:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-01 14:53:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-01 14:53:43,187 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2020-12-01 14:53:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:43,187 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-01 14:53:43,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 14:53:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-01 14:53:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-01 14:53:43,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:43,188 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:43,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:43,417 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1331662092, now seen corresponding path program 8 times [2020-12-01 14:53:43,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:43,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938558829] [2020-12-01 14:53:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:43,431 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:43,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652759916] [2020-12-01 14:53:43,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:43,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:53:43,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:43,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-01 14:53:43,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:43,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938558829] [2020-12-01 14:53:43,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:43,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652759916] [2020-12-01 14:53:43,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:43,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-01 14:53:43,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540859074] [2020-12-01 14:53:43,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 14:53:43,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:43,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 14:53:43,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-01 14:53:43,710 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-12-01 14:53:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:43,863 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-01 14:53:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-01 14:53:43,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-12-01 14:53:43,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:43,865 INFO L225 Difference]: With dead ends: 61 [2020-12-01 14:53:43,865 INFO L226 Difference]: Without dead ends: 57 [2020-12-01 14:53:43,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-12-01 14:53:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-01 14:53:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-01 14:53:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-01 14:53:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-12-01 14:53:43,885 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2020-12-01 14:53:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:43,885 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-12-01 14:53:43,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 14:53:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-12-01 14:53:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-01 14:53:43,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:43,886 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:44,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-01 14:53:44,087 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:44,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1553460103, now seen corresponding path program 9 times [2020-12-01 14:53:44,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:44,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683147589] [2020-12-01 14:53:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:44,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:44,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450794639] [2020-12-01 14:53:44,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:44,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-01 14:53:44,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-01 14:53:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:44,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683147589] [2020-12-01 14:53:44,427 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:44,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450794639] [2020-12-01 14:53:44,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:44,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-01 14:53:44,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686478612] [2020-12-01 14:53:44,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 14:53:44,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:44,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 14:53:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-01 14:53:44,429 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 13 states. [2020-12-01 14:53:44,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:44,585 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-01 14:53:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-01 14:53:44,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-12-01 14:53:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:44,586 INFO L225 Difference]: With dead ends: 66 [2020-12-01 14:53:44,587 INFO L226 Difference]: Without dead ends: 62 [2020-12-01 14:53:44,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-12-01 14:53:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-01 14:53:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-01 14:53:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-01 14:53:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-12-01 14:53:44,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2020-12-01 14:53:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:44,601 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-12-01 14:53:44,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 14:53:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-12-01 14:53:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-01 14:53:44,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:44,604 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:44,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-01 14:53:44,817 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1399051988, now seen corresponding path program 10 times [2020-12-01 14:53:44,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:44,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844715668] [2020-12-01 14:53:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:44,823 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:44,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586176368] [2020-12-01 14:53:44,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:44,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:53:44,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:44,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-01 14:53:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:45,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844715668] [2020-12-01 14:53:45,126 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:45,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586176368] [2020-12-01 14:53:45,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:45,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-01 14:53:45,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163203798] [2020-12-01 14:53:45,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-01 14:53:45,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:45,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-01 14:53:45,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-12-01 14:53:45,128 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 14 states. [2020-12-01 14:53:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:45,278 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-12-01 14:53:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-01 14:53:45,278 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-12-01 14:53:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:45,279 INFO L225 Difference]: With dead ends: 71 [2020-12-01 14:53:45,279 INFO L226 Difference]: Without dead ends: 67 [2020-12-01 14:53:45,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2020-12-01 14:53:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-01 14:53:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-01 14:53:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-01 14:53:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-12-01 14:53:45,287 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2020-12-01 14:53:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:45,287 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-12-01 14:53:45,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-01 14:53:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-12-01 14:53:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-01 14:53:45,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:45,289 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:45,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-01 14:53:45,501 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1773663143, now seen corresponding path program 11 times [2020-12-01 14:53:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:45,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618623596] [2020-12-01 14:53:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:45,510 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:45,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903485694] [2020-12-01 14:53:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:45,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-01 14:53:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-01 14:53:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:45,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618623596] [2020-12-01 14:53:45,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:45,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903485694] [2020-12-01 14:53:45,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:45,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-01 14:53:45,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337233725] [2020-12-01 14:53:45,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-01 14:53:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-01 14:53:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-12-01 14:53:45,819 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 15 states. [2020-12-01 14:53:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:45,995 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-12-01 14:53:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-01 14:53:45,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-01 14:53:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:45,996 INFO L225 Difference]: With dead ends: 76 [2020-12-01 14:53:45,996 INFO L226 Difference]: Without dead ends: 72 [2020-12-01 14:53:45,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2020-12-01 14:53:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-01 14:53:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-01 14:53:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-01 14:53:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-12-01 14:53:46,011 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2020-12-01 14:53:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:46,011 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-12-01 14:53:46,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-01 14:53:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-12-01 14:53:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-01 14:53:46,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:46,015 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:46,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:46,234 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:46,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1470358196, now seen corresponding path program 12 times [2020-12-01 14:53:46,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:46,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457462262] [2020-12-01 14:53:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:46,251 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:46,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204833010] [2020-12-01 14:53:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:46,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-01 14:53:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:46,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-01 14:53:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:46,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457462262] [2020-12-01 14:53:46,587 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:46,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204833010] [2020-12-01 14:53:46,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:46,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-01 14:53:46,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313550691] [2020-12-01 14:53:46,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-01 14:53:46,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-01 14:53:46,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-12-01 14:53:46,591 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 16 states. [2020-12-01 14:53:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:46,792 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-12-01 14:53:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-01 14:53:46,792 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-12-01 14:53:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:46,793 INFO L225 Difference]: With dead ends: 81 [2020-12-01 14:53:46,793 INFO L226 Difference]: Without dead ends: 77 [2020-12-01 14:53:46,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-12-01 14:53:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-01 14:53:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-01 14:53:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-01 14:53:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-12-01 14:53:46,801 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2020-12-01 14:53:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:46,801 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-12-01 14:53:46,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-01 14:53:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-12-01 14:53:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-01 14:53:46,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:46,802 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:47,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-01 14:53:47,009 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1359238087, now seen corresponding path program 13 times [2020-12-01 14:53:47,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:47,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498699425] [2020-12-01 14:53:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:47,017 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:47,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503412326] [2020-12-01 14:53:47,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:53:47,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-01 14:53:47,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:47,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498699425] [2020-12-01 14:53:47,345 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:47,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503412326] [2020-12-01 14:53:47,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:47,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-01 14:53:47,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766568466] [2020-12-01 14:53:47,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-01 14:53:47,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-01 14:53:47,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-12-01 14:53:47,347 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 17 states. [2020-12-01 14:53:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:47,558 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-12-01 14:53:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-01 14:53:47,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-01 14:53:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:47,559 INFO L225 Difference]: With dead ends: 86 [2020-12-01 14:53:47,559 INFO L226 Difference]: Without dead ends: 82 [2020-12-01 14:53:47,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2020-12-01 14:53:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-01 14:53:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-01 14:53:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-01 14:53:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-12-01 14:53:47,567 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2020-12-01 14:53:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:47,567 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-12-01 14:53:47,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-01 14:53:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-12-01 14:53:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-01 14:53:47,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:47,568 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:47,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-01 14:53:47,785 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash -665753236, now seen corresponding path program 14 times [2020-12-01 14:53:47,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:47,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3774233] [2020-12-01 14:53:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:47,793 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:47,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440364057] [2020-12-01 14:53:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:47,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:53:47,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:47,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-01 14:53:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:48,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3774233] [2020-12-01 14:53:48,157 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:48,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440364057] [2020-12-01 14:53:48,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:48,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-01 14:53:48,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276670232] [2020-12-01 14:53:48,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 14:53:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 14:53:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-12-01 14:53:48,161 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 18 states. [2020-12-01 14:53:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:48,405 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-12-01 14:53:48,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-01 14:53:48,406 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-01 14:53:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:48,406 INFO L225 Difference]: With dead ends: 91 [2020-12-01 14:53:48,406 INFO L226 Difference]: Without dead ends: 87 [2020-12-01 14:53:48,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2020-12-01 14:53:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-01 14:53:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-01 14:53:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-01 14:53:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-12-01 14:53:48,414 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2020-12-01 14:53:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:48,415 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-12-01 14:53:48,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 14:53:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-12-01 14:53:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-01 14:53:48,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:48,416 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:48,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-01 14:53:48,631 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 386987033, now seen corresponding path program 15 times [2020-12-01 14:53:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:48,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501953829] [2020-12-01 14:53:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:48,638 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:48,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367354235] [2020-12-01 14:53:48,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:48,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-01 14:53:48,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:48,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-01 14:53:48,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:49,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501953829] [2020-12-01 14:53:49,066 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:49,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367354235] [2020-12-01 14:53:49,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:49,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-01 14:53:49,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067065225] [2020-12-01 14:53:49,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-01 14:53:49,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:49,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-01 14:53:49,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-12-01 14:53:49,068 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 19 states. [2020-12-01 14:53:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:49,384 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-12-01 14:53:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-01 14:53:49,385 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-12-01 14:53:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:49,386 INFO L225 Difference]: With dead ends: 96 [2020-12-01 14:53:49,386 INFO L226 Difference]: Without dead ends: 92 [2020-12-01 14:53:49,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2020-12-01 14:53:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-01 14:53:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-01 14:53:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-01 14:53:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-12-01 14:53:49,395 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2020-12-01 14:53:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:49,396 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-12-01 14:53:49,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-01 14:53:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-12-01 14:53:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-01 14:53:49,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:49,397 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:49,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:49,613 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash -609350260, now seen corresponding path program 16 times [2020-12-01 14:53:49,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:49,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083089483] [2020-12-01 14:53:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:49,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:49,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930247074] [2020-12-01 14:53:49,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:49,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:53:49,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:49,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-01 14:53:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083089483] [2020-12-01 14:53:50,037 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:50,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930247074] [2020-12-01 14:53:50,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:50,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-01 14:53:50,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378672269] [2020-12-01 14:53:50,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 14:53:50,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 14:53:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-12-01 14:53:50,040 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 20 states. [2020-12-01 14:53:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:50,362 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-12-01 14:53:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-01 14:53:50,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-12-01 14:53:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:50,363 INFO L225 Difference]: With dead ends: 101 [2020-12-01 14:53:50,363 INFO L226 Difference]: Without dead ends: 97 [2020-12-01 14:53:50,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2020-12-01 14:53:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-01 14:53:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-01 14:53:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-01 14:53:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-12-01 14:53:50,371 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 91 [2020-12-01 14:53:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:50,372 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-12-01 14:53:50,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 14:53:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-12-01 14:53:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-01 14:53:50,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:50,373 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:50,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:50,589 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash -560602119, now seen corresponding path program 17 times [2020-12-01 14:53:50,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:50,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700213009] [2020-12-01 14:53:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:50,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:50,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178186903] [2020-12-01 14:53:50,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:50,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-01 14:53:50,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:50,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-01 14:53:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:51,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700213009] [2020-12-01 14:53:51,107 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:51,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178186903] [2020-12-01 14:53:51,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:51,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-01 14:53:51,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571522862] [2020-12-01 14:53:51,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-01 14:53:51,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:51,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-01 14:53:51,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-12-01 14:53:51,110 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 21 states. [2020-12-01 14:53:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:51,424 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-12-01 14:53:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-01 14:53:51,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-01 14:53:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:51,425 INFO L225 Difference]: With dead ends: 106 [2020-12-01 14:53:51,425 INFO L226 Difference]: Without dead ends: 102 [2020-12-01 14:53:51,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2020-12-01 14:53:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-01 14:53:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-01 14:53:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-01 14:53:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-12-01 14:53:51,435 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 96 [2020-12-01 14:53:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:51,435 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-12-01 14:53:51,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-01 14:53:51,436 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-12-01 14:53:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-01 14:53:51,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:51,437 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:51,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-01 14:53:51,661 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2065959340, now seen corresponding path program 18 times [2020-12-01 14:53:51,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:51,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048793443] [2020-12-01 14:53:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:51,668 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:51,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695435494] [2020-12-01 14:53:51,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:51,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-01 14:53:51,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-01 14:53:51,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:52,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048793443] [2020-12-01 14:53:52,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:52,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695435494] [2020-12-01 14:53:52,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:52,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-01 14:53:52,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855738279] [2020-12-01 14:53:52,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-01 14:53:52,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:52,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-01 14:53:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-12-01 14:53:52,181 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 22 states. [2020-12-01 14:53:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:52,526 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-12-01 14:53:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-01 14:53:52,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-12-01 14:53:52,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:52,528 INFO L225 Difference]: With dead ends: 111 [2020-12-01 14:53:52,528 INFO L226 Difference]: Without dead ends: 107 [2020-12-01 14:53:52,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2020-12-01 14:53:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-01 14:53:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-01 14:53:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-01 14:53:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-12-01 14:53:52,536 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 101 [2020-12-01 14:53:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:52,536 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-12-01 14:53:52,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-01 14:53:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-12-01 14:53:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-01 14:53:52,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:52,537 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:52,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-01 14:53:52,750 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:52,751 INFO L82 PathProgramCache]: Analyzing trace with hash -602375207, now seen corresponding path program 19 times [2020-12-01 14:53:52,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:52,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388539366] [2020-12-01 14:53:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:52,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:52,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037682166] [2020-12-01 14:53:52,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:53:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-01 14:53:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:53,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388539366] [2020-12-01 14:53:53,310 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:53,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037682166] [2020-12-01 14:53:53,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:53,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-01 14:53:53,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087280564] [2020-12-01 14:53:53,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-01 14:53:53,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-01 14:53:53,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-01 14:53:53,312 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 23 states. [2020-12-01 14:53:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:53,654 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-12-01 14:53:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-01 14:53:53,655 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-12-01 14:53:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:53,656 INFO L225 Difference]: With dead ends: 116 [2020-12-01 14:53:53,656 INFO L226 Difference]: Without dead ends: 112 [2020-12-01 14:53:53,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2020-12-01 14:53:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-01 14:53:53,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-01 14:53:53,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-01 14:53:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-12-01 14:53:53,663 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 106 [2020-12-01 14:53:53,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:53,664 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-12-01 14:53:53,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-01 14:53:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-12-01 14:53:53,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-01 14:53:53,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:53,665 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:53,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:53,889 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:53,889 INFO L82 PathProgramCache]: Analyzing trace with hash -924492340, now seen corresponding path program 20 times [2020-12-01 14:53:53,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:53,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573547804] [2020-12-01 14:53:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:53,896 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:53,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773554702] [2020-12-01 14:53:53,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:54,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:53:54,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-01 14:53:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:54,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573547804] [2020-12-01 14:53:54,445 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:54,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773554702] [2020-12-01 14:53:54,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:54,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-01 14:53:54,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282633009] [2020-12-01 14:53:54,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-01 14:53:54,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:54,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-01 14:53:54,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-12-01 14:53:54,448 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 24 states. [2020-12-01 14:53:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:54,851 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2020-12-01 14:53:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-01 14:53:54,851 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-12-01 14:53:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:54,852 INFO L225 Difference]: With dead ends: 121 [2020-12-01 14:53:54,853 INFO L226 Difference]: Without dead ends: 117 [2020-12-01 14:53:54,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2020-12-01 14:53:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-01 14:53:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-12-01 14:53:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-01 14:53:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-12-01 14:53:54,862 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 111 [2020-12-01 14:53:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:54,863 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-12-01 14:53:54,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-01 14:53:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-12-01 14:53:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-01 14:53:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:54,864 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:55,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-01 14:53:55,085 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1935230023, now seen corresponding path program 21 times [2020-12-01 14:53:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:55,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802136770] [2020-12-01 14:53:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:55,094 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:55,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892184333] [2020-12-01 14:53:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:55,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-01 14:53:55,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-01 14:53:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:55,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802136770] [2020-12-01 14:53:55,795 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892184333] [2020-12-01 14:53:55,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:55,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-01 14:53:55,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603524899] [2020-12-01 14:53:55,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-01 14:53:55,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:55,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-01 14:53:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-12-01 14:53:55,798 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 25 states. [2020-12-01 14:53:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:56,274 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-12-01 14:53:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-01 14:53:56,274 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-12-01 14:53:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:56,275 INFO L225 Difference]: With dead ends: 126 [2020-12-01 14:53:56,275 INFO L226 Difference]: Without dead ends: 122 [2020-12-01 14:53:56,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2020-12-01 14:53:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-01 14:53:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-12-01 14:53:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-01 14:53:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-12-01 14:53:56,283 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 116 [2020-12-01 14:53:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:56,283 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-12-01 14:53:56,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-01 14:53:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-12-01 14:53:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-01 14:53:56,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:56,284 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:56,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:56,484 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1084492268, now seen corresponding path program 22 times [2020-12-01 14:53:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:56,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079594767] [2020-12-01 14:53:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:56,491 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:56,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799898046] [2020-12-01 14:53:56,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:56,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:53:56,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:56,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-01 14:53:56,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:57,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079594767] [2020-12-01 14:53:57,164 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:57,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799898046] [2020-12-01 14:53:57,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:57,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-01 14:53:57,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373095179] [2020-12-01 14:53:57,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-01 14:53:57,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-01 14:53:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-12-01 14:53:57,166 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 26 states. [2020-12-01 14:53:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:57,709 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2020-12-01 14:53:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-01 14:53:57,710 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-12-01 14:53:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:57,711 INFO L225 Difference]: With dead ends: 131 [2020-12-01 14:53:57,711 INFO L226 Difference]: Without dead ends: 127 [2020-12-01 14:53:57,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2020-12-01 14:53:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-01 14:53:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-01 14:53:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-01 14:53:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2020-12-01 14:53:57,722 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 121 [2020-12-01 14:53:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:57,722 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2020-12-01 14:53:57,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-01 14:53:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2020-12-01 14:53:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-01 14:53:57,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:57,724 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:57,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-01 14:53:57,941 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash -204561511, now seen corresponding path program 23 times [2020-12-01 14:53:57,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:57,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529192230] [2020-12-01 14:53:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:57,948 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:57,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183119471] [2020-12-01 14:53:57,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:58,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-01 14:53:58,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-01 14:53:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:53:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:53:58,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529192230] [2020-12-01 14:53:58,693 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:53:58,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183119471] [2020-12-01 14:53:58,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:53:58,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-01 14:53:58,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860109299] [2020-12-01 14:53:58,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-01 14:53:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:53:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-01 14:53:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-12-01 14:53:58,696 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 27 states. [2020-12-01 14:53:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:53:59,192 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2020-12-01 14:53:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-01 14:53:59,193 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2020-12-01 14:53:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:53:59,193 INFO L225 Difference]: With dead ends: 136 [2020-12-01 14:53:59,193 INFO L226 Difference]: Without dead ends: 132 [2020-12-01 14:53:59,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2020-12-01 14:53:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-01 14:53:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-01 14:53:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-01 14:53:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-12-01 14:53:59,203 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 126 [2020-12-01 14:53:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:53:59,203 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-12-01 14:53:59,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-01 14:53:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-12-01 14:53:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-01 14:53:59,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:53:59,205 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:53:59,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-01 14:53:59,417 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:53:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:53:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash -409858548, now seen corresponding path program 24 times [2020-12-01 14:53:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:53:59,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668418332] [2020-12-01 14:53:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:53:59,426 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:53:59,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797369349] [2020-12-01 14:53:59,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:53:59,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-01 14:53:59,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:53:59,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-01 14:53:59,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:00,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668418332] [2020-12-01 14:54:00,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:00,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797369349] [2020-12-01 14:54:00,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:00,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-01 14:54:00,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701497620] [2020-12-01 14:54:00,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-01 14:54:00,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:00,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-01 14:54:00,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-12-01 14:54:00,145 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 28 states. [2020-12-01 14:54:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:00,682 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2020-12-01 14:54:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-01 14:54:00,683 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2020-12-01 14:54:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:00,685 INFO L225 Difference]: With dead ends: 141 [2020-12-01 14:54:00,685 INFO L226 Difference]: Without dead ends: 137 [2020-12-01 14:54:00,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2020-12-01 14:54:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-01 14:54:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-12-01 14:54:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-01 14:54:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2020-12-01 14:54:00,695 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 131 [2020-12-01 14:54:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:00,696 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2020-12-01 14:54:00,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-01 14:54:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2020-12-01 14:54:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-01 14:54:00,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:00,697 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:00,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-01 14:54:00,924 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:00,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2073965433, now seen corresponding path program 25 times [2020-12-01 14:54:00,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:00,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702649141] [2020-12-01 14:54:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:00,933 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:00,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657511115] [2020-12-01 14:54:00,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:54:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-01 14:54:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:01,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702649141] [2020-12-01 14:54:01,672 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:01,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657511115] [2020-12-01 14:54:01,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:01,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-12-01 14:54:01,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807861591] [2020-12-01 14:54:01,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-01 14:54:01,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:01,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-01 14:54:01,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-12-01 14:54:01,674 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 29 states. [2020-12-01 14:54:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:02,195 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2020-12-01 14:54:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-01 14:54:02,196 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2020-12-01 14:54:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:02,197 INFO L225 Difference]: With dead ends: 146 [2020-12-01 14:54:02,197 INFO L226 Difference]: Without dead ends: 142 [2020-12-01 14:54:02,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2020-12-01 14:54:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-01 14:54:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-12-01 14:54:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-01 14:54:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-12-01 14:54:02,208 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 136 [2020-12-01 14:54:02,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:02,208 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-12-01 14:54:02,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-01 14:54:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-12-01 14:54:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-01 14:54:02,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:02,210 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:02,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-01 14:54:02,417 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:02,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1818323500, now seen corresponding path program 26 times [2020-12-01 14:54:02,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:02,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369275934] [2020-12-01 14:54:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:02,425 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:02,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598101541] [2020-12-01 14:54:02,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:02,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:54:02,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:02,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-01 14:54:02,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:03,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369275934] [2020-12-01 14:54:03,165 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:03,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598101541] [2020-12-01 14:54:03,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:03,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-01 14:54:03,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72819616] [2020-12-01 14:54:03,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-01 14:54:03,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:03,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-01 14:54:03,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-12-01 14:54:03,166 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 30 states. [2020-12-01 14:54:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:03,823 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2020-12-01 14:54:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-01 14:54:03,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-12-01 14:54:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:03,825 INFO L225 Difference]: With dead ends: 151 [2020-12-01 14:54:03,825 INFO L226 Difference]: Without dead ends: 147 [2020-12-01 14:54:03,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2020-12-01 14:54:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-01 14:54:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-12-01 14:54:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-01 14:54:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-12-01 14:54:03,835 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 141 [2020-12-01 14:54:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:03,836 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-12-01 14:54:03,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-01 14:54:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-12-01 14:54:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-01 14:54:03,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:03,844 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:04,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:04,057 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash -727487655, now seen corresponding path program 27 times [2020-12-01 14:54:04,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:04,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191518124] [2020-12-01 14:54:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:04,064 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:04,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468738701] [2020-12-01 14:54:04,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:04,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-01 14:54:04,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:04,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-01 14:54:04,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:04,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191518124] [2020-12-01 14:54:04,863 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:04,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468738701] [2020-12-01 14:54:04,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:04,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-12-01 14:54:04,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217455214] [2020-12-01 14:54:04,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-01 14:54:04,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:04,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-01 14:54:04,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-12-01 14:54:04,865 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 31 states. [2020-12-01 14:54:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:05,462 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2020-12-01 14:54:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-01 14:54:05,462 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-12-01 14:54:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:05,464 INFO L225 Difference]: With dead ends: 156 [2020-12-01 14:54:05,464 INFO L226 Difference]: Without dead ends: 152 [2020-12-01 14:54:05,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2020-12-01 14:54:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-01 14:54:05,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-12-01 14:54:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-01 14:54:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-12-01 14:54:05,474 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 146 [2020-12-01 14:54:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:05,474 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-12-01 14:54:05,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-01 14:54:05,475 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-12-01 14:54:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-01 14:54:05,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:05,476 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:05,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:05,701 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1195646540, now seen corresponding path program 28 times [2020-12-01 14:54:05,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:05,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081561731] [2020-12-01 14:54:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:05,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:05,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862952153] [2020-12-01 14:54:05,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:05,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:54:05,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-01 14:54:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:06,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081561731] [2020-12-01 14:54:06,534 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:06,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862952153] [2020-12-01 14:54:06,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:06,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-01 14:54:06,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863081354] [2020-12-01 14:54:06,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-01 14:54:06,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:06,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-01 14:54:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-12-01 14:54:06,536 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 32 states. [2020-12-01 14:54:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:07,335 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2020-12-01 14:54:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-01 14:54:07,336 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2020-12-01 14:54:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:07,338 INFO L225 Difference]: With dead ends: 161 [2020-12-01 14:54:07,338 INFO L226 Difference]: Without dead ends: 157 [2020-12-01 14:54:07,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2020-12-01 14:54:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-01 14:54:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-12-01 14:54:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-01 14:54:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2020-12-01 14:54:07,351 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 151 [2020-12-01 14:54:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:07,351 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2020-12-01 14:54:07,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-01 14:54:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2020-12-01 14:54:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-01 14:54:07,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:07,353 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:07,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:07,569 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash -705934535, now seen corresponding path program 29 times [2020-12-01 14:54:07,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:07,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584252295] [2020-12-01 14:54:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:07,578 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:07,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773530527] [2020-12-01 14:54:07,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:07,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-01 14:54:07,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:07,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-01 14:54:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:08,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584252295] [2020-12-01 14:54:08,432 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:08,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773530527] [2020-12-01 14:54:08,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:08,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-12-01 14:54:08,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722214086] [2020-12-01 14:54:08,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-01 14:54:08,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:08,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-01 14:54:08,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-12-01 14:54:08,434 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand 33 states. [2020-12-01 14:54:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:09,191 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2020-12-01 14:54:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-01 14:54:09,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-12-01 14:54:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:09,193 INFO L225 Difference]: With dead ends: 166 [2020-12-01 14:54:09,194 INFO L226 Difference]: Without dead ends: 162 [2020-12-01 14:54:09,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2020-12-01 14:54:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-01 14:54:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-12-01 14:54:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-01 14:54:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-12-01 14:54:09,205 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 156 [2020-12-01 14:54:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:09,206 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-12-01 14:54:09,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-01 14:54:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-12-01 14:54:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-01 14:54:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:09,207 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:09,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-01 14:54:09,421 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash -638834068, now seen corresponding path program 30 times [2020-12-01 14:54:09,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:09,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245769928] [2020-12-01 14:54:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:09,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:09,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380682621] [2020-12-01 14:54:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:09,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-01 14:54:09,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-01 14:54:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:10,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245769928] [2020-12-01 14:54:10,528 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:10,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380682621] [2020-12-01 14:54:10,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:10,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-01 14:54:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8801820] [2020-12-01 14:54:10,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-01 14:54:10,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-01 14:54:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-12-01 14:54:10,530 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand 34 states. [2020-12-01 14:54:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:11,342 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2020-12-01 14:54:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-01 14:54:11,342 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 161 [2020-12-01 14:54:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:11,344 INFO L225 Difference]: With dead ends: 171 [2020-12-01 14:54:11,344 INFO L226 Difference]: Without dead ends: 167 [2020-12-01 14:54:11,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2020-12-01 14:54:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-01 14:54:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-12-01 14:54:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-01 14:54:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2020-12-01 14:54:11,356 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 161 [2020-12-01 14:54:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:11,356 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2020-12-01 14:54:11,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-01 14:54:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2020-12-01 14:54:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-01 14:54:11,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:11,358 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:11,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:11,585 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1560728345, now seen corresponding path program 31 times [2020-12-01 14:54:11,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:11,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707530381] [2020-12-01 14:54:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:11,595 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:11,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724981784] [2020-12-01 14:54:11,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:54:11,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-01 14:54:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:12,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707530381] [2020-12-01 14:54:12,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:12,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724981784] [2020-12-01 14:54:12,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:12,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-12-01 14:54:12,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004401436] [2020-12-01 14:54:12,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-01 14:54:12,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-01 14:54:12,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-12-01 14:54:12,571 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 35 states. [2020-12-01 14:54:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:13,379 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2020-12-01 14:54:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-01 14:54:13,380 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2020-12-01 14:54:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:13,381 INFO L225 Difference]: With dead ends: 176 [2020-12-01 14:54:13,382 INFO L226 Difference]: Without dead ends: 172 [2020-12-01 14:54:13,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2020-12-01 14:54:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-01 14:54:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-12-01 14:54:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-01 14:54:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2020-12-01 14:54:13,395 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 166 [2020-12-01 14:54:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:13,395 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2020-12-01 14:54:13,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-01 14:54:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2020-12-01 14:54:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-01 14:54:13,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:13,397 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:13,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-01 14:54:13,613 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1886679412, now seen corresponding path program 32 times [2020-12-01 14:54:13,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:13,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357468519] [2020-12-01 14:54:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:13,626 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:13,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388241657] [2020-12-01 14:54:13,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:13,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:54:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:13,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-01 14:54:13,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:14,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357468519] [2020-12-01 14:54:14,748 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:14,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388241657] [2020-12-01 14:54:14,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:14,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-01 14:54:14,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377180051] [2020-12-01 14:54:14,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-01 14:54:14,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:14,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-01 14:54:14,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-12-01 14:54:14,754 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand 36 states. [2020-12-01 14:54:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:15,548 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2020-12-01 14:54:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-01 14:54:15,548 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 171 [2020-12-01 14:54:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:15,550 INFO L225 Difference]: With dead ends: 181 [2020-12-01 14:54:15,550 INFO L226 Difference]: Without dead ends: 177 [2020-12-01 14:54:15,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2020-12-01 14:54:15,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-01 14:54:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-12-01 14:54:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-01 14:54:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-12-01 14:54:15,565 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 171 [2020-12-01 14:54:15,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:15,565 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-12-01 14:54:15,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-01 14:54:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-12-01 14:54:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-01 14:54:15,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:15,567 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:15,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:15,793 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:15,793 INFO L82 PathProgramCache]: Analyzing trace with hash 771818233, now seen corresponding path program 33 times [2020-12-01 14:54:15,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:15,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678875321] [2020-12-01 14:54:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:15,800 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:15,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780248445] [2020-12-01 14:54:15,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:16,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-01 14:54:16,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:16,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-01 14:54:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678875321] [2020-12-01 14:54:17,122 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780248445] [2020-12-01 14:54:17,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:17,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-01 14:54:17,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428785994] [2020-12-01 14:54:17,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-01 14:54:17,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-01 14:54:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-12-01 14:54:17,124 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 37 states. [2020-12-01 14:54:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:18,273 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2020-12-01 14:54:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-01 14:54:18,273 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 176 [2020-12-01 14:54:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:18,275 INFO L225 Difference]: With dead ends: 186 [2020-12-01 14:54:18,275 INFO L226 Difference]: Without dead ends: 182 [2020-12-01 14:54:18,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2020-12-01 14:54:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-01 14:54:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-12-01 14:54:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-01 14:54:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-12-01 14:54:18,289 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 176 [2020-12-01 14:54:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:18,290 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-12-01 14:54:18,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-01 14:54:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-12-01 14:54:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-01 14:54:18,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:18,292 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:18,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-01 14:54:18,505 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash -53196116, now seen corresponding path program 34 times [2020-12-01 14:54:18,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:18,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49453589] [2020-12-01 14:54:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:18,515 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:18,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960338130] [2020-12-01 14:54:18,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:18,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:54:18,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-01 14:54:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:19,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49453589] [2020-12-01 14:54:19,851 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:19,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960338130] [2020-12-01 14:54:19,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:19,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-01 14:54:19,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459120023] [2020-12-01 14:54:19,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-01 14:54:19,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-01 14:54:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-12-01 14:54:19,854 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 38 states. [2020-12-01 14:54:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:20,784 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2020-12-01 14:54:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-01 14:54:20,784 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 181 [2020-12-01 14:54:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:20,786 INFO L225 Difference]: With dead ends: 191 [2020-12-01 14:54:20,786 INFO L226 Difference]: Without dead ends: 187 [2020-12-01 14:54:20,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1926, Invalid=3186, Unknown=0, NotChecked=0, Total=5112 [2020-12-01 14:54:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-01 14:54:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-12-01 14:54:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-01 14:54:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-12-01 14:54:20,800 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 181 [2020-12-01 14:54:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:20,801 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-12-01 14:54:20,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-01 14:54:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-12-01 14:54:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-01 14:54:20,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:20,803 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:21,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-01 14:54:21,029 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -748102951, now seen corresponding path program 35 times [2020-12-01 14:54:21,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:21,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402515452] [2020-12-01 14:54:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:21,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:21,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753543964] [2020-12-01 14:54:21,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:21,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-01 14:54:21,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:21,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-01 14:54:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:22,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402515452] [2020-12-01 14:54:22,393 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:22,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753543964] [2020-12-01 14:54:22,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:22,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-12-01 14:54:22,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203833902] [2020-12-01 14:54:22,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-01 14:54:22,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:22,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-01 14:54:22,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-12-01 14:54:22,394 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 39 states. [2020-12-01 14:54:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:23,521 INFO L93 Difference]: Finished difference Result 196 states and 232 transitions. [2020-12-01 14:54:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-01 14:54:23,521 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 186 [2020-12-01 14:54:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:23,522 INFO L225 Difference]: With dead ends: 196 [2020-12-01 14:54:23,522 INFO L226 Difference]: Without dead ends: 192 [2020-12-01 14:54:23,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2035, Invalid=3367, Unknown=0, NotChecked=0, Total=5402 [2020-12-01 14:54:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-01 14:54:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-12-01 14:54:23,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-01 14:54:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2020-12-01 14:54:23,535 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 186 [2020-12-01 14:54:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:23,535 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2020-12-01 14:54:23,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-01 14:54:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2020-12-01 14:54:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-01 14:54:23,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:23,537 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:23,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-01 14:54:23,754 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash -500020, now seen corresponding path program 36 times [2020-12-01 14:54:23,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:23,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017240001] [2020-12-01 14:54:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:23,764 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:23,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602083061] [2020-12-01 14:54:23,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:24,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-01 14:54:24,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-01 14:54:24,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:25,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017240001] [2020-12-01 14:54:25,155 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:25,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602083061] [2020-12-01 14:54:25,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:25,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-01 14:54:25,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425685451] [2020-12-01 14:54:25,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-01 14:54:25,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:25,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-01 14:54:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-12-01 14:54:25,156 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand 40 states. [2020-12-01 14:54:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:26,235 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2020-12-01 14:54:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-01 14:54:26,235 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 191 [2020-12-01 14:54:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:26,237 INFO L225 Difference]: With dead ends: 201 [2020-12-01 14:54:26,237 INFO L226 Difference]: Without dead ends: 197 [2020-12-01 14:54:26,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2020-12-01 14:54:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-01 14:54:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-12-01 14:54:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-01 14:54:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2020-12-01 14:54:26,251 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 191 [2020-12-01 14:54:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:26,252 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2020-12-01 14:54:26,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-01 14:54:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2020-12-01 14:54:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-01 14:54:26,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:26,254 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:26,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-01 14:54:26,469 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2118933177, now seen corresponding path program 37 times [2020-12-01 14:54:26,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:26,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555588995] [2020-12-01 14:54:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:26,476 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:26,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701521112] [2020-12-01 14:54:26,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:54:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-01 14:54:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555588995] [2020-12-01 14:54:27,687 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701521112] [2020-12-01 14:54:27,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:27,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-12-01 14:54:27,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676042525] [2020-12-01 14:54:27,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-01 14:54:27,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:27,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-01 14:54:27,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-12-01 14:54:27,688 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 41 states. [2020-12-01 14:54:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:28,962 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2020-12-01 14:54:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-01 14:54:28,963 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 196 [2020-12-01 14:54:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:28,964 INFO L225 Difference]: With dead ends: 206 [2020-12-01 14:54:28,965 INFO L226 Difference]: Without dead ends: 202 [2020-12-01 14:54:28,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2020-12-01 14:54:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-01 14:54:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-12-01 14:54:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-01 14:54:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2020-12-01 14:54:28,980 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 196 [2020-12-01 14:54:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:28,980 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2020-12-01 14:54:28,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-01 14:54:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2020-12-01 14:54:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-01 14:54:28,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:28,982 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:29,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:29,197 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash -525743380, now seen corresponding path program 38 times [2020-12-01 14:54:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:29,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362020009] [2020-12-01 14:54:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:29,211 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:29,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914140562] [2020-12-01 14:54:29,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:29,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:54:29,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:29,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-01 14:54:29,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:30,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362020009] [2020-12-01 14:54:30,445 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:30,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914140562] [2020-12-01 14:54:30,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:30,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-01 14:54:30,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629540038] [2020-12-01 14:54:30,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-01 14:54:30,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:30,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-01 14:54:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-12-01 14:54:30,447 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand 42 states. [2020-12-01 14:54:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:31,734 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2020-12-01 14:54:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-01 14:54:31,735 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 201 [2020-12-01 14:54:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:31,746 INFO L225 Difference]: With dead ends: 211 [2020-12-01 14:54:31,746 INFO L226 Difference]: Without dead ends: 207 [2020-12-01 14:54:31,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2380, Invalid=3940, Unknown=0, NotChecked=0, Total=6320 [2020-12-01 14:54:31,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-01 14:54:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-12-01 14:54:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-01 14:54:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2020-12-01 14:54:31,761 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 201 [2020-12-01 14:54:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:31,761 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2020-12-01 14:54:31,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-01 14:54:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2020-12-01 14:54:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-01 14:54:31,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:31,763 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:31,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-01 14:54:31,989 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash -432438631, now seen corresponding path program 39 times [2020-12-01 14:54:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:31,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109038542] [2020-12-01 14:54:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:31,999 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:31,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7481440] [2020-12-01 14:54:32,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:32,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-01 14:54:32,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:32,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-01 14:54:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:33,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109038542] [2020-12-01 14:54:33,638 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:33,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7481440] [2020-12-01 14:54:33,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:33,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-12-01 14:54:33,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194550743] [2020-12-01 14:54:33,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-01 14:54:33,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:33,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-01 14:54:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-12-01 14:54:33,641 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 43 states. [2020-12-01 14:54:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:34,935 INFO L93 Difference]: Finished difference Result 216 states and 256 transitions. [2020-12-01 14:54:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-01 14:54:34,936 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 206 [2020-12-01 14:54:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:34,938 INFO L225 Difference]: With dead ends: 216 [2020-12-01 14:54:34,938 INFO L226 Difference]: Without dead ends: 212 [2020-12-01 14:54:34,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2020-12-01 14:54:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-01 14:54:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2020-12-01 14:54:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-01 14:54:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2020-12-01 14:54:34,955 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 206 [2020-12-01 14:54:34,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:34,958 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2020-12-01 14:54:34,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-01 14:54:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2020-12-01 14:54:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-01 14:54:34,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:34,960 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:35,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:35,177 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:35,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1880788748, now seen corresponding path program 40 times [2020-12-01 14:54:35,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:35,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656012461] [2020-12-01 14:54:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:35,194 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:35,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956683283] [2020-12-01 14:54:35,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:35,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:54:35,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:35,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-01 14:54:35,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:36,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656012461] [2020-12-01 14:54:36,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:36,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956683283] [2020-12-01 14:54:36,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:36,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-01 14:54:36,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44586106] [2020-12-01 14:54:36,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-01 14:54:36,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:36,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-01 14:54:36,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-12-01 14:54:36,612 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 44 states. [2020-12-01 14:54:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:37,887 INFO L93 Difference]: Finished difference Result 221 states and 262 transitions. [2020-12-01 14:54:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-01 14:54:37,888 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 211 [2020-12-01 14:54:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:37,890 INFO L225 Difference]: With dead ends: 221 [2020-12-01 14:54:37,890 INFO L226 Difference]: Without dead ends: 217 [2020-12-01 14:54:37,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2625, Invalid=4347, Unknown=0, NotChecked=0, Total=6972 [2020-12-01 14:54:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-01 14:54:37,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-12-01 14:54:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-01 14:54:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 258 transitions. [2020-12-01 14:54:37,906 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 258 transitions. Word has length 211 [2020-12-01 14:54:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:37,907 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 258 transitions. [2020-12-01 14:54:37,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-01 14:54:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 258 transitions. [2020-12-01 14:54:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-01 14:54:37,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:37,909 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:38,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:38,125 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:38,125 INFO L82 PathProgramCache]: Analyzing trace with hash 691950201, now seen corresponding path program 41 times [2020-12-01 14:54:38,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:38,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138631245] [2020-12-01 14:54:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:38,135 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:38,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399533896] [2020-12-01 14:54:38,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:38,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-01 14:54:38,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-01 14:54:38,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:39,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138631245] [2020-12-01 14:54:39,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:39,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399533896] [2020-12-01 14:54:39,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:39,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-12-01 14:54:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854224633] [2020-12-01 14:54:39,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-01 14:54:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-01 14:54:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-12-01 14:54:39,814 INFO L87 Difference]: Start difference. First operand 217 states and 258 transitions. Second operand 45 states. [2020-12-01 14:54:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:41,168 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2020-12-01 14:54:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-01 14:54:41,171 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 216 [2020-12-01 14:54:41,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:41,173 INFO L225 Difference]: With dead ends: 226 [2020-12-01 14:54:41,173 INFO L226 Difference]: Without dead ends: 222 [2020-12-01 14:54:41,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2752, Invalid=4558, Unknown=0, NotChecked=0, Total=7310 [2020-12-01 14:54:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-01 14:54:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2020-12-01 14:54:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-01 14:54:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2020-12-01 14:54:41,187 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 216 [2020-12-01 14:54:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:41,187 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2020-12-01 14:54:41,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-01 14:54:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2020-12-01 14:54:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-01 14:54:41,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:41,189 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:41,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-01 14:54:41,417 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 687647532, now seen corresponding path program 42 times [2020-12-01 14:54:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:41,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934627073] [2020-12-01 14:54:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:41,426 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:41,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027547186] [2020-12-01 14:54:41,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:41,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-01 14:54:41,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-01 14:54:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:43,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934627073] [2020-12-01 14:54:43,349 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027547186] [2020-12-01 14:54:43,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:43,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-01 14:54:43,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530830357] [2020-12-01 14:54:43,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-01 14:54:43,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:43,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-01 14:54:43,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-12-01 14:54:43,351 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand 46 states. [2020-12-01 14:54:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:44,764 INFO L93 Difference]: Finished difference Result 231 states and 274 transitions. [2020-12-01 14:54:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-01 14:54:44,764 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2020-12-01 14:54:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:44,766 INFO L225 Difference]: With dead ends: 231 [2020-12-01 14:54:44,766 INFO L226 Difference]: Without dead ends: 227 [2020-12-01 14:54:44,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2020-12-01 14:54:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-01 14:54:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-12-01 14:54:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-01 14:54:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2020-12-01 14:54:44,780 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 221 [2020-12-01 14:54:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:44,781 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2020-12-01 14:54:44,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-01 14:54:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2020-12-01 14:54:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-01 14:54:44,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:44,783 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:44,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-01 14:54:44,997 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1410807207, now seen corresponding path program 43 times [2020-12-01 14:54:44,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:44,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220796378] [2020-12-01 14:54:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:45,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:45,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596039441] [2020-12-01 14:54:45,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:54:45,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-01 14:54:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:46,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220796378] [2020-12-01 14:54:46,811 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:46,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596039441] [2020-12-01 14:54:46,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:46,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-01 14:54:46,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639519322] [2020-12-01 14:54:46,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-01 14:54:46,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-01 14:54:46,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-12-01 14:54:46,813 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand 47 states. [2020-12-01 14:54:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:48,318 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2020-12-01 14:54:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-01 14:54:48,318 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 226 [2020-12-01 14:54:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:48,320 INFO L225 Difference]: With dead ends: 236 [2020-12-01 14:54:48,320 INFO L226 Difference]: Without dead ends: 232 [2020-12-01 14:54:48,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2020-12-01 14:54:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-01 14:54:48,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-12-01 14:54:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-01 14:54:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2020-12-01 14:54:48,337 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 226 [2020-12-01 14:54:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:48,337 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2020-12-01 14:54:48,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-01 14:54:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2020-12-01 14:54:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-12-01 14:54:48,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:48,340 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:48,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-01 14:54:48,565 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1333927756, now seen corresponding path program 44 times [2020-12-01 14:54:48,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:48,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149438494] [2020-12-01 14:54:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:48,572 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:48,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326627581] [2020-12-01 14:54:48,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:48,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:54:48,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-01 14:54:48,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:50,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149438494] [2020-12-01 14:54:50,449 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:50,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326627581] [2020-12-01 14:54:50,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:50,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-01 14:54:50,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297659762] [2020-12-01 14:54:50,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-01 14:54:50,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:50,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-01 14:54:50,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-12-01 14:54:50,452 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand 48 states. [2020-12-01 14:54:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:52,228 INFO L93 Difference]: Finished difference Result 241 states and 286 transitions. [2020-12-01 14:54:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-01 14:54:52,229 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2020-12-01 14:54:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:52,231 INFO L225 Difference]: With dead ends: 241 [2020-12-01 14:54:52,231 INFO L226 Difference]: Without dead ends: 237 [2020-12-01 14:54:52,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3151, Invalid=5221, Unknown=0, NotChecked=0, Total=8372 [2020-12-01 14:54:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-01 14:54:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2020-12-01 14:54:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-01 14:54:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2020-12-01 14:54:52,248 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 231 [2020-12-01 14:54:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:52,249 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2020-12-01 14:54:52,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-01 14:54:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2020-12-01 14:54:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-01 14:54:52,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:52,251 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:52,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:52,477 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:52,477 INFO L82 PathProgramCache]: Analyzing trace with hash -112793031, now seen corresponding path program 45 times [2020-12-01 14:54:52,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:52,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492610060] [2020-12-01 14:54:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:52,485 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:52,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900969690] [2020-12-01 14:54:52,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:53,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-01 14:54:53,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-01 14:54:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492610060] [2020-12-01 14:54:55,105 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:55,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900969690] [2020-12-01 14:54:55,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:55,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-01 14:54:55,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757228713] [2020-12-01 14:54:55,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-01 14:54:55,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:55,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-01 14:54:55,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-12-01 14:54:55,107 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand 49 states. [2020-12-01 14:54:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:54:56,896 INFO L93 Difference]: Finished difference Result 246 states and 292 transitions. [2020-12-01 14:54:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-01 14:54:56,897 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 236 [2020-12-01 14:54:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:54:56,898 INFO L225 Difference]: With dead ends: 246 [2020-12-01 14:54:56,899 INFO L226 Difference]: Without dead ends: 242 [2020-12-01 14:54:56,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2020-12-01 14:54:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-01 14:54:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-12-01 14:54:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-01 14:54:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 288 transitions. [2020-12-01 14:54:56,910 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 288 transitions. Word has length 236 [2020-12-01 14:54:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:54:56,910 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 288 transitions. [2020-12-01 14:54:56,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-01 14:54:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 288 transitions. [2020-12-01 14:54:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-01 14:54:56,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:54:56,912 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:54:57,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-01 14:54:57,112 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:54:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:54:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash 291302252, now seen corresponding path program 46 times [2020-12-01 14:54:57,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:54:57,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849877396] [2020-12-01 14:54:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:54:57,124 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:54:57,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428041421] [2020-12-01 14:54:57,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:54:57,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:54:57,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:54:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-01 14:54:57,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:54:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:54:59,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849877396] [2020-12-01 14:54:59,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:54:59,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428041421] [2020-12-01 14:54:59,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:54:59,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-12-01 14:54:59,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970681482] [2020-12-01 14:54:59,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-01 14:54:59,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:54:59,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-01 14:54:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-12-01 14:54:59,245 INFO L87 Difference]: Start difference. First operand 242 states and 288 transitions. Second operand 50 states. [2020-12-01 14:55:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:55:01,054 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2020-12-01 14:55:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-12-01 14:55:01,055 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 241 [2020-12-01 14:55:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:55:01,056 INFO L225 Difference]: With dead ends: 251 [2020-12-01 14:55:01,057 INFO L226 Difference]: Without dead ends: 247 [2020-12-01 14:55:01,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2020-12-01 14:55:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-12-01 14:55:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-12-01 14:55:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-01 14:55:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 294 transitions. [2020-12-01 14:55:01,070 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 294 transitions. Word has length 241 [2020-12-01 14:55:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:55:01,070 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 294 transitions. [2020-12-01 14:55:01,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-01 14:55:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 294 transitions. [2020-12-01 14:55:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-01 14:55:01,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:55:01,072 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:55:01,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-01 14:55:01,273 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:55:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:55:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1561939431, now seen corresponding path program 47 times [2020-12-01 14:55:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:55:01,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52205493] [2020-12-01 14:55:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:55:01,284 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:55:01,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407741332] [2020-12-01 14:55:01,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:55:01,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-01 14:55:01,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:55:01,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-01 14:55:01,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:55:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:55:03,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52205493] [2020-12-01 14:55:03,354 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:55:03,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407741332] [2020-12-01 14:55:03,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:55:03,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-12-01 14:55:03,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083243354] [2020-12-01 14:55:03,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-01 14:55:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:55:03,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-01 14:55:03,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-12-01 14:55:03,356 INFO L87 Difference]: Start difference. First operand 247 states and 294 transitions. Second operand 51 states. [2020-12-01 14:55:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:55:05,326 INFO L93 Difference]: Finished difference Result 256 states and 304 transitions. [2020-12-01 14:55:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-01 14:55:05,327 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 246 [2020-12-01 14:55:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:55:05,329 INFO L225 Difference]: With dead ends: 256 [2020-12-01 14:55:05,330 INFO L226 Difference]: Without dead ends: 252 [2020-12-01 14:55:05,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3577, Invalid=5929, Unknown=0, NotChecked=0, Total=9506 [2020-12-01 14:55:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-01 14:55:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-12-01 14:55:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-01 14:55:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2020-12-01 14:55:05,360 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 246 [2020-12-01 14:55:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:55:05,360 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2020-12-01 14:55:05,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-01 14:55:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2020-12-01 14:55:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-01 14:55:05,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:55:05,363 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:55:05,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:55:05,585 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:55:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:55:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1514205300, now seen corresponding path program 48 times [2020-12-01 14:55:05,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:55:05,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173200992] [2020-12-01 14:55:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:55:05,594 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:55:05,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961833103] [2020-12-01 14:55:05,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:55:06,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-01 14:55:06,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:55:06,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-01 14:55:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:55:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:55:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173200992] [2020-12-01 14:55:08,115 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:55:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961833103] [2020-12-01 14:55:08,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:55:08,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-01 14:55:08,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255308205] [2020-12-01 14:55:08,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-01 14:55:08,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:55:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-01 14:55:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-12-01 14:55:08,116 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand 52 states. [2020-12-01 14:55:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:55:10,089 INFO L93 Difference]: Finished difference Result 261 states and 310 transitions. [2020-12-01 14:55:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-01 14:55:10,090 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 251 [2020-12-01 14:55:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:55:10,092 INFO L225 Difference]: With dead ends: 261 [2020-12-01 14:55:10,092 INFO L226 Difference]: Without dead ends: 257 [2020-12-01 14:55:10,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2020-12-01 14:55:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-01 14:55:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2020-12-01 14:55:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-01 14:55:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 306 transitions. [2020-12-01 14:55:10,110 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 306 transitions. Word has length 251 [2020-12-01 14:55:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:55:10,111 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 306 transitions. [2020-12-01 14:55:10,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-01 14:55:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 306 transitions. [2020-12-01 14:55:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-01 14:55:10,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:55:10,113 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:55:10,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-01 14:55:10,326 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:55:10,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:55:10,327 INFO L82 PathProgramCache]: Analyzing trace with hash 550904313, now seen corresponding path program 49 times [2020-12-01 14:55:10,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:55:10,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514732659] [2020-12-01 14:55:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:55:10,335 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:55:10,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552716947] [2020-12-01 14:55:10,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:55:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:55:10,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-01 14:55:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:55:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:55:12,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514732659] [2020-12-01 14:55:12,730 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:55:12,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552716947] [2020-12-01 14:55:12,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:55:12,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-12-01 14:55:12,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154189787] [2020-12-01 14:55:12,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-01 14:55:12,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:55:12,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-01 14:55:12,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-12-01 14:55:12,734 INFO L87 Difference]: Start difference. First operand 257 states and 306 transitions. Second operand 53 states. [2020-12-01 14:55:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:55:14,693 INFO L93 Difference]: Finished difference Result 266 states and 316 transitions. [2020-12-01 14:55:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-12-01 14:55:14,694 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 256 [2020-12-01 14:55:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:55:14,695 INFO L225 Difference]: With dead ends: 266 [2020-12-01 14:55:14,695 INFO L226 Difference]: Without dead ends: 262 [2020-12-01 14:55:14,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2020-12-01 14:55:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-01 14:55:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-12-01 14:55:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-01 14:55:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 312 transitions. [2020-12-01 14:55:14,709 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 312 transitions. Word has length 256 [2020-12-01 14:55:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:55:14,710 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 312 transitions. [2020-12-01 14:55:14,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-01 14:55:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 312 transitions. [2020-12-01 14:55:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-01 14:55:14,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:55:14,712 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:55:14,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:55:14,925 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:55:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:55:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1834650540, now seen corresponding path program 50 times [2020-12-01 14:55:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:55:14,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74716499] [2020-12-01 14:55:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:55:14,932 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:55:14,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586325386] [2020-12-01 14:55:14,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:55:15,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:55:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-01 14:55:15,135 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 14:55:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 14:55:15,258 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 14:55:16,495 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 14:55:16,496 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 14:55:16,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-01 14:55:16,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 02:55:16 BoogieIcfgContainer [2020-12-01 14:55:16,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 14:55:16,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 14:55:16,949 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 14:55:16,949 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 14:55:16,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:53:37" (3/4) ... [2020-12-01 14:55:16,953 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 14:55:17,155 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_59159054-580e-458c-b970-8675c18a2b8e/bin/uautomizer/witness.graphml [2020-12-01 14:55:17,155 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 14:55:17,157 INFO L168 Benchmark]: Toolchain (without parser) took 100097.74 ms. Allocated memory was 81.8 MB in the beginning and 524.3 MB in the end (delta: 442.5 MB). Free memory was 50.7 MB in the beginning and 442.5 MB in the end (delta: -391.8 MB). Peak memory consumption was 50.2 MB. Max. memory is 16.1 GB. [2020-12-01 14:55:17,158 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 81.8 MB. Free memory was 41.1 MB in the beginning and 41.1 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:55:17,158 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.53 ms. Allocated memory is still 81.8 MB. Free memory was 50.5 MB in the beginning and 59.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 14:55:17,159 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.93 ms. Allocated memory is still 81.8 MB. Free memory was 59.6 MB in the beginning and 58.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 14:55:17,159 INFO L168 Benchmark]: Boogie Preprocessor took 17.55 ms. Allocated memory is still 81.8 MB. Free memory was 58.2 MB in the beginning and 57.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:55:17,160 INFO L168 Benchmark]: RCFGBuilder took 296.68 ms. Allocated memory is still 81.8 MB. Free memory was 57.0 MB in the beginning and 44.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 14:55:17,160 INFO L168 Benchmark]: TraceAbstraction took 99248.82 ms. Allocated memory was 81.8 MB in the beginning and 524.3 MB in the end (delta: 442.5 MB). Free memory was 43.8 MB in the beginning and 462.5 MB in the end (delta: -418.6 MB). Peak memory consumption was 306.2 MB. Max. memory is 16.1 GB. [2020-12-01 14:55:17,161 INFO L168 Benchmark]: Witness Printer took 206.71 ms. Allocated memory is still 524.3 MB. Free memory was 462.5 MB in the beginning and 442.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-01 14:55:17,163 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 81.8 MB. Free memory was 41.1 MB in the beginning and 41.1 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 276.53 ms. Allocated memory is still 81.8 MB. Free memory was 50.5 MB in the beginning and 59.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.93 ms. Allocated memory is still 81.8 MB. Free memory was 59.6 MB in the beginning and 58.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.55 ms. Allocated memory is still 81.8 MB. Free memory was 58.2 MB in the beginning and 57.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 296.68 ms. Allocated memory is still 81.8 MB. Free memory was 57.0 MB in the beginning and 44.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 99248.82 ms. Allocated memory was 81.8 MB in the beginning and 524.3 MB in the end (delta: 442.5 MB). Free memory was 43.8 MB in the beginning and 462.5 MB in the end (delta: -418.6 MB). Peak memory consumption was 306.2 MB. Max. memory is 16.1 GB. * Witness Printer took 206.71 ms. Allocated memory is still 524.3 MB. Free memory was 462.5 MB in the beginning and 442.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=21] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=21] [L36] EXPR counter++ VAL [counter=22] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=22] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=22] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=22] [L36] EXPR counter++ VAL [counter=23] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=23] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=23] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=23] [L36] EXPR counter++ VAL [counter=24] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=24] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=24] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=24] [L36] EXPR counter++ VAL [counter=25] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=25] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=25] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=25] [L36] EXPR counter++ VAL [counter=26] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=26] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=26] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=26] [L36] EXPR counter++ VAL [counter=27] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=27] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=27] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=27] [L36] EXPR counter++ VAL [counter=28] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=28] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=28] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=28] [L36] EXPR counter++ VAL [counter=29] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=29] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=29] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=29] [L36] EXPR counter++ VAL [counter=30] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=30] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=30] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=30] [L36] EXPR counter++ VAL [counter=31] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=31] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=31] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=31] [L36] EXPR counter++ VAL [counter=32] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=32] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=32] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=32] [L36] EXPR counter++ VAL [counter=33] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=33] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=33] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=33] [L36] EXPR counter++ VAL [counter=34] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=34] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=34] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=34] [L36] EXPR counter++ VAL [counter=35] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=35] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=35] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=35] [L36] EXPR counter++ VAL [counter=36] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=36] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=36] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=36] [L36] EXPR counter++ VAL [counter=37] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=37] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=37] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=37] [L36] EXPR counter++ VAL [counter=38] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=38] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=38] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=38] [L36] EXPR counter++ VAL [counter=39] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=39] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=39] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=39] [L36] EXPR counter++ VAL [counter=40] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=40] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=40] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=40] [L36] EXPR counter++ VAL [counter=41] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=41] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=41] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=41] [L36] EXPR counter++ VAL [counter=42] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=42] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=42] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=42] [L36] EXPR counter++ VAL [counter=43] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=43] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=43] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=43] [L36] EXPR counter++ VAL [counter=44] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=44] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=44] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=44] [L36] EXPR counter++ VAL [counter=45] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=45] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=45] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=45] [L36] EXPR counter++ VAL [counter=46] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=46] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=46] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=46] [L36] EXPR counter++ VAL [counter=47] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=47] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=47] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=47] [L36] EXPR counter++ VAL [counter=48] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=48] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=48] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=48] [L36] EXPR counter++ VAL [counter=49] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=49] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=49] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=49] [L36] EXPR counter++ VAL [counter=50] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=50] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=50] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=50] [L36] EXPR counter++ VAL [counter=51] [L36] COND FALSE !(counter++<50) [L16] COND TRUE !(cond) VAL [counter=51] [L9] __assert_fail("0", "mannadiv.c", 9, "reach_error") VAL [counter=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 98.9s, OverallIterations: 54, TraceHistogramMax: 51, AutomataDifference: 37.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 746 SDtfs, 2985 SDslu, 7146 SDs, 0 SdLazy, 2930 SolverSat, 136 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7881 GetRequests, 5310 SyntacticMatches, 0 SemanticMatches, 2571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20841 ImplicationChecksByTransitivity, 57.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 53 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 37.7s InterpolantComputationTime, 6969 NumberOfCodeBlocks, 6969 NumberOfCodeBlocksAsserted, 687 NumberOfCheckSat, 6655 ConstructedInterpolants, 0 QuantifiedInterpolants, 3376695 SizeOfPredicates, 1245 NumberOfNonLiveVariables, 26870 ConjunctsInSsa, 2641 ConjunctsInUnsatCore, 53 InterpolantComputations, 4 PerfectInterpolantSequences, 0/100450 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...