./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 d3c827d9ba12fd72f48686db35c000bb18f3620c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 05:11:15,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 05:11:15,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 05:11:15,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 05:11:15,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 05:11:15,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 05:11:15,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 05:11:15,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 05:11:15,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 05:11:15,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 05:11:15,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 05:11:15,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 05:11:15,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 05:11:15,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 05:11:15,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 05:11:15,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 05:11:15,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 05:11:15,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 05:11:15,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 05:11:15,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 05:11:15,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 05:11:15,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 05:11:15,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 05:11:15,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 05:11:15,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 05:11:15,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 05:11:15,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 05:11:15,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 05:11:15,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 05:11:15,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 05:11:15,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 05:11:15,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 05:11:15,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 05:11:15,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 05:11:15,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 05:11:15,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 05:11:15,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 05:11:15,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 05:11:15,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 05:11:15,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 05:11:15,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 05:11:15,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 05:11:15,145 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 05:11:15,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 05:11:15,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 05:11:15,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 05:11:15,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 05:11:15,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 05:11:15,148 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 05:11:15,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 05:11:15,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 05:11:15,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 05:11:15,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 05:11:15,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 05:11:15,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 05:11:15,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 05:11:15,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 05:11:15,150 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 05:11:15,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 05:11:15,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 05:11:15,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 05:11:15,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 05:11:15,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 05:11:15,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 05:11:15,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:11:15,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 05:11:15,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 05:11:15,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 05:11:15,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 05:11:15,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 05:11:15,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 05:11:15,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 05:11:15,152 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3c827d9ba12fd72f48686db35c000bb18f3620c [2021-08-26 05:11:15,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 05:11:15,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 05:11:15,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 05:11:15,416 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 05:11:15,416 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 05:11:15,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2021-08-26 05:11:15,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d61780b5/eff573cc1d814107a720d1b15a333a25/FLAG19c8c67e8 [2021-08-26 05:11:15,853 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 05:11:15,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2021-08-26 05:11:15,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d61780b5/eff573cc1d814107a720d1b15a333a25/FLAG19c8c67e8 [2021-08-26 05:11:16,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d61780b5/eff573cc1d814107a720d1b15a333a25 [2021-08-26 05:11:16,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 05:11:16,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 05:11:16,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 05:11:16,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 05:11:16,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 05:11:16,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d077de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16, skipping insertion in model container [2021-08-26 05:11:16,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 05:11:16,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 05:11:16,355 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c[576,589] [2021-08-26 05:11:16,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:11:16,368 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 05:11:16,374 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c[576,589] [2021-08-26 05:11:16,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:11:16,411 INFO L208 MainTranslator]: Completed translation [2021-08-26 05:11:16,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16 WrapperNode [2021-08-26 05:11:16,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 05:11:16,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 05:11:16,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 05:11:16,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 05:11:16,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 05:11:16,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 05:11:16,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 05:11:16,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 05:11:16,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 05:11:16,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 05:11:16,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 05:11:16,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 05:11:16,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (1/1) ... [2021-08-26 05:11:16,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:11:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:16,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 05:11:16,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 05:11:16,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 05:11:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 05:11:16,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 05:11:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 05:11:16,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 05:11:16,782 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-08-26 05:11:16,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:11:16 BoogieIcfgContainer [2021-08-26 05:11:16,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 05:11:16,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 05:11:16,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 05:11:16,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 05:11:16,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:11:16" (1/3) ... [2021-08-26 05:11:16,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b44ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:11:16, skipping insertion in model container [2021-08-26 05:11:16,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:11:16" (2/3) ... [2021-08-26 05:11:16,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b44ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:11:16, skipping insertion in model container [2021-08-26 05:11:16,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:11:16" (3/3) ... [2021-08-26 05:11:16,807 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.c [2021-08-26 05:11:16,810 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 05:11:16,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-26 05:11:16,854 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 05:11:16,862 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 05:11:16,862 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-26 05:11:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 05:11:16,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:16,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:16,910 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash 122367883, now seen corresponding path program 1 times [2021-08-26 05:11:16,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:16,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117477372] [2021-08-26 05:11:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:16,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:17,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:17,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117477372] [2021-08-26 05:11:17,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117477372] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:17,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:17,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 05:11:17,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494588710] [2021-08-26 05:11:17,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 05:11:17,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 05:11:17,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 05:11:17,062 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:17,077 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2021-08-26 05:11:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 05:11:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 05:11:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:17,084 INFO L225 Difference]: With dead ends: 79 [2021-08-26 05:11:17,084 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 05:11:17,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 05:11:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 05:11:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-26 05:11:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-08-26 05:11:17,109 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 8 [2021-08-26 05:11:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:17,110 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-08-26 05:11:17,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-08-26 05:11:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 05:11:17,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:17,112 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:17,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 05:11:17,112 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-26 05:11:17,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:17,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018480433] [2021-08-26 05:11:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:17,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:17,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:17,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813070015] [2021-08-26 05:11:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:17,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:17,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:17,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:17,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 05:11:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 05:11:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:17,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:17,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018480433] [2021-08-26 05:11:17,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:17,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813070015] [2021-08-26 05:11:17,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813070015] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:17,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:17,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 05:11:17,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330554562] [2021-08-26 05:11:17,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:11:17,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:11:17,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:17,424 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:17,610 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-08-26 05:11:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:11:17,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 05:11:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:17,612 INFO L225 Difference]: With dead ends: 51 [2021-08-26 05:11:17,612 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 05:11:17,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:11:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 05:11:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-08-26 05:11:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-08-26 05:11:17,616 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 8 [2021-08-26 05:11:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:17,616 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-08-26 05:11:17,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-08-26 05:11:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 05:11:17,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:17,617 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:17,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 05:11:17,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:17,834 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1182906761, now seen corresponding path program 1 times [2021-08-26 05:11:17,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:17,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423356710] [2021-08-26 05:11:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:17,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:17,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:17,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945130036] [2021-08-26 05:11:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:17,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:17,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:17,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:17,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 05:11:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 05:11:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:17,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:17,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423356710] [2021-08-26 05:11:17,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:17,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945130036] [2021-08-26 05:11:17,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945130036] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:17,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:17,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 05:11:17,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706907695] [2021-08-26 05:11:17,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:11:17,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:11:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:11:17,978 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:17,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:17,995 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-08-26 05:11:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 05:11:17,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-26 05:11:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:17,998 INFO L225 Difference]: With dead ends: 44 [2021-08-26 05:11:17,998 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 05:11:17,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:11:17,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 05:11:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-26 05:11:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-08-26 05:11:18,001 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 9 [2021-08-26 05:11:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:18,002 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-08-26 05:11:18,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-08-26 05:11:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 05:11:18,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:18,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:18,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:18,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 05:11:18,219 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:18,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:18,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2021-08-26 05:11:18,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:18,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233765957] [2021-08-26 05:11:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:18,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:18,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:18,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453387770] [2021-08-26 05:11:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:18,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:18,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:18,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:18,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 05:11:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 05:11:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:18,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:18,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233765957] [2021-08-26 05:11:18,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:18,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453387770] [2021-08-26 05:11:18,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453387770] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:18,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 05:11:18,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220842953] [2021-08-26 05:11:18,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:11:18,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:11:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:18,447 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:18,613 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-08-26 05:11:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:11:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 05:11:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:18,614 INFO L225 Difference]: With dead ends: 74 [2021-08-26 05:11:18,614 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 05:11:18,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:11:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 05:11:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2021-08-26 05:11:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-08-26 05:11:18,619 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 10 [2021-08-26 05:11:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:18,619 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-08-26 05:11:18,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-08-26 05:11:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 05:11:18,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:18,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:18,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:18,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:18,836 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:18,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:18,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1896102171, now seen corresponding path program 1 times [2021-08-26 05:11:18,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:18,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834759736] [2021-08-26 05:11:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:18,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:18,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:18,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150619367] [2021-08-26 05:11:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:18,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:18,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:18,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:18,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 05:11:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:11:18,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:18,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:18,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834759736] [2021-08-26 05:11:18,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:18,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150619367] [2021-08-26 05:11:18,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150619367] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:18,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:18,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:11:18,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778266893] [2021-08-26 05:11:18,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:11:18,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:18,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:11:18,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:11:18,999 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:19,093 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2021-08-26 05:11:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:11:19,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 05:11:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:19,095 INFO L225 Difference]: With dead ends: 104 [2021-08-26 05:11:19,095 INFO L226 Difference]: Without dead ends: 98 [2021-08-26 05:11:19,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:11:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-26 05:11:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2021-08-26 05:11:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.338235294117647) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-08-26 05:11:19,101 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 14 [2021-08-26 05:11:19,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:19,101 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-08-26 05:11:19,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-08-26 05:11:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:11:19,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:19,102 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:19,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:19,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:19,330 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:19,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1527669658, now seen corresponding path program 1 times [2021-08-26 05:11:19,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:19,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992212977] [2021-08-26 05:11:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:19,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:19,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:19,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953795899] [2021-08-26 05:11:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:19,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:19,338 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:19,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 05:11:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:19,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 05:11:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:19,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:19,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992212977] [2021-08-26 05:11:19,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:19,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953795899] [2021-08-26 05:11:19,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953795899] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:19,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:19,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:11:19,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828412605] [2021-08-26 05:11:19,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:11:19,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:19,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:11:19,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:11:19,453 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:19,474 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2021-08-26 05:11:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:11:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 05:11:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:19,475 INFO L225 Difference]: With dead ends: 121 [2021-08-26 05:11:19,475 INFO L226 Difference]: Without dead ends: 75 [2021-08-26 05:11:19,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:11:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-26 05:11:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-26 05:11:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-08-26 05:11:19,480 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 18 [2021-08-26 05:11:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:19,480 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-08-26 05:11:19,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-08-26 05:11:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:11:19,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:19,480 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:19,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:19,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:19,697 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2092681793, now seen corresponding path program 1 times [2021-08-26 05:11:19,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:19,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127643459] [2021-08-26 05:11:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:19,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:19,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:19,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70000643] [2021-08-26 05:11:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:19,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:19,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:19,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 05:11:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:19,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:11:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:19,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:19,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127643459] [2021-08-26 05:11:19,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:19,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70000643] [2021-08-26 05:11:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70000643] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:19,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:19,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 05:11:19,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156378027] [2021-08-26 05:11:19,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:11:19,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:11:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:19,869 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:19,963 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2021-08-26 05:11:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:11:19,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 05:11:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:19,964 INFO L225 Difference]: With dead ends: 82 [2021-08-26 05:11:19,964 INFO L226 Difference]: Without dead ends: 80 [2021-08-26 05:11:19,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:11:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-26 05:11:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2021-08-26 05:11:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-08-26 05:11:19,969 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 18 [2021-08-26 05:11:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:19,969 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-08-26 05:11:19,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-08-26 05:11:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 05:11:19,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:19,970 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:19,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:20,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:20,190 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1135496359, now seen corresponding path program 1 times [2021-08-26 05:11:20,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:20,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706714907] [2021-08-26 05:11:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:20,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:20,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:20,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685474544] [2021-08-26 05:11:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:20,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:20,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:20,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:20,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 05:11:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:11:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:20,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:20,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706714907] [2021-08-26 05:11:20,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:20,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685474544] [2021-08-26 05:11:20,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685474544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:20,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:20,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:11:20,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840609971] [2021-08-26 05:11:20,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:11:20,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:20,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:11:20,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:20,372 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:20,391 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-08-26 05:11:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:11:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 05:11:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:20,392 INFO L225 Difference]: With dead ends: 82 [2021-08-26 05:11:20,392 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 05:11:20,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:11:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 05:11:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-08-26 05:11:20,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-08-26 05:11:20,397 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 24 [2021-08-26 05:11:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:20,397 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-08-26 05:11:20,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-08-26 05:11:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 05:11:20,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:20,398 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:20,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:20,615 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:20,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1501746768, now seen corresponding path program 1 times [2021-08-26 05:11:20,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:20,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339763516] [2021-08-26 05:11:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:20,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:20,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:20,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602623626] [2021-08-26 05:11:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:20,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:20,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:20,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:20,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 05:11:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 05:11:20,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:20,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:20,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339763516] [2021-08-26 05:11:20,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:20,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602623626] [2021-08-26 05:11:20,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602623626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:20,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:20,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:11:20,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926669617] [2021-08-26 05:11:20,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:11:20,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:20,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:11:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:11:20,991 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:21,214 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-08-26 05:11:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:11:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 05:11:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:21,215 INFO L225 Difference]: With dead ends: 142 [2021-08-26 05:11:21,215 INFO L226 Difference]: Without dead ends: 136 [2021-08-26 05:11:21,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:11:21,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-26 05:11:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2021-08-26 05:11:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 95 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2021-08-26 05:11:21,228 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 24 [2021-08-26 05:11:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:21,229 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2021-08-26 05:11:21,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2021-08-26 05:11:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 05:11:21,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:21,229 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:21,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:21,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 05:11:21,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash 839910097, now seen corresponding path program 1 times [2021-08-26 05:11:21,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:21,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50229553] [2021-08-26 05:11:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:21,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:21,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:21,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840309527] [2021-08-26 05:11:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:21,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:21,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:21,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:21,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 05:11:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:21,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 05:11:21,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:21,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:21,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50229553] [2021-08-26 05:11:21,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:21,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840309527] [2021-08-26 05:11:21,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840309527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:21,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:21,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:11:21,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721450773] [2021-08-26 05:11:21,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:11:21,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:11:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:21,761 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:21,891 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2021-08-26 05:11:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:11:21,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 05:11:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:21,891 INFO L225 Difference]: With dead ends: 154 [2021-08-26 05:11:21,892 INFO L226 Difference]: Without dead ends: 146 [2021-08-26 05:11:21,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:11:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-26 05:11:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 108. [2021-08-26 05:11:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.2450980392156863) internal successors, (127), 107 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2021-08-26 05:11:21,898 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 25 [2021-08-26 05:11:21,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:21,898 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2021-08-26 05:11:21,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2021-08-26 05:11:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 05:11:21,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:21,898 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:21,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:22,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 05:11:22,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1388511663, now seen corresponding path program 1 times [2021-08-26 05:11:22,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:22,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926097937] [2021-08-26 05:11:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:22,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:22,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:22,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286911023] [2021-08-26 05:11:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:22,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:22,124 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:22,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 05:11:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:22,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:11:22,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:22,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:22,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926097937] [2021-08-26 05:11:22,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:22,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286911023] [2021-08-26 05:11:22,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286911023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:22,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:22,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:11:22,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549371544] [2021-08-26 05:11:22,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:11:22,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:11:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:22,350 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:22,371 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2021-08-26 05:11:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:11:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 05:11:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:22,372 INFO L225 Difference]: With dead ends: 166 [2021-08-26 05:11:22,372 INFO L226 Difference]: Without dead ends: 112 [2021-08-26 05:11:22,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:11:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-26 05:11:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-08-26 05:11:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 111 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2021-08-26 05:11:22,377 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 28 [2021-08-26 05:11:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:22,377 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2021-08-26 05:11:22,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2021-08-26 05:11:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 05:11:22,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:22,378 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:22,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:22,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 05:11:22,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1005744700, now seen corresponding path program 1 times [2021-08-26 05:11:22,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:22,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881277744] [2021-08-26 05:11:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:22,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:22,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:22,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682055916] [2021-08-26 05:11:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:22,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:22,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:22,602 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:22,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 05:11:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 05:11:22,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:22,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:22,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881277744] [2021-08-26 05:11:22,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:22,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682055916] [2021-08-26 05:11:22,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682055916] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:22,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:22,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 05:11:22,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411624116] [2021-08-26 05:11:22,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:11:22,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:11:22,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:11:22,833 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:22,883 INFO L93 Difference]: Finished difference Result 215 states and 249 transitions. [2021-08-26 05:11:22,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:11:22,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-26 05:11:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:22,884 INFO L225 Difference]: With dead ends: 215 [2021-08-26 05:11:22,884 INFO L226 Difference]: Without dead ends: 125 [2021-08-26 05:11:22,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-26 05:11:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2021-08-26 05:11:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 99 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2021-08-26 05:11:22,889 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 33 [2021-08-26 05:11:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:22,889 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2021-08-26 05:11:22,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2021-08-26 05:11:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 05:11:22,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:22,890 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:22,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:23,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 05:11:23,104 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash 332875516, now seen corresponding path program 1 times [2021-08-26 05:11:23,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:23,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323976344] [2021-08-26 05:11:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:23,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:23,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:23,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649877106] [2021-08-26 05:11:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:23,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:23,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:23,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:23,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 05:11:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:11:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:23,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:23,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323976344] [2021-08-26 05:11:23,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:23,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649877106] [2021-08-26 05:11:23,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649877106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:23,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:23,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:11:23,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425344441] [2021-08-26 05:11:23,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:11:23,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:23,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:11:23,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:11:23,370 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:23,393 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-08-26 05:11:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:11:23,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 05:11:23,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:23,394 INFO L225 Difference]: With dead ends: 109 [2021-08-26 05:11:23,394 INFO L226 Difference]: Without dead ends: 105 [2021-08-26 05:11:23,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:11:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-26 05:11:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-08-26 05:11:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-08-26 05:11:23,399 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 34 [2021-08-26 05:11:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:23,400 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-08-26 05:11:23,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-08-26 05:11:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 05:11:23,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:23,401 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:23,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:23,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 05:11:23,613 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:23,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1990599685, now seen corresponding path program 2 times [2021-08-26 05:11:23,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:23,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408962410] [2021-08-26 05:11:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:23,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:23,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:23,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507667676] [2021-08-26 05:11:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:11:23,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:23,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:23,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:23,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 05:11:23,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:11:23,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 05:11:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:24,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:24,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408962410] [2021-08-26 05:11:24,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:24,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507667676] [2021-08-26 05:11:24,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507667676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:24,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:24,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:11:24,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57815200] [2021-08-26 05:11:24,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:11:24,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:24,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:11:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:11:24,054 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:24,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:24,338 INFO L93 Difference]: Finished difference Result 188 states and 216 transitions. [2021-08-26 05:11:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:11:24,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 05:11:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:24,340 INFO L225 Difference]: With dead ends: 188 [2021-08-26 05:11:24,340 INFO L226 Difference]: Without dead ends: 182 [2021-08-26 05:11:24,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-26 05:11:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-26 05:11:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 123. [2021-08-26 05:11:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 122 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-08-26 05:11:24,345 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 34 [2021-08-26 05:11:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:24,345 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-08-26 05:11:24,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-08-26 05:11:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 05:11:24,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:24,346 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:24,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:24,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 05:11:24,561 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:24,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1728467740, now seen corresponding path program 1 times [2021-08-26 05:11:24,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:24,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966516873] [2021-08-26 05:11:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:24,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:24,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:24,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264623647] [2021-08-26 05:11:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:24,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:24,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:24,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 05:11:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:24,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 05:11:24,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:25,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:25,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966516873] [2021-08-26 05:11:25,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:25,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264623647] [2021-08-26 05:11:25,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264623647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:25,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:25,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:11:25,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696947604] [2021-08-26 05:11:25,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:11:25,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:25,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:11:25,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:11:25,180 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:25,351 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2021-08-26 05:11:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:11:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-26 05:11:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:25,353 INFO L225 Difference]: With dead ends: 197 [2021-08-26 05:11:25,353 INFO L226 Difference]: Without dead ends: 189 [2021-08-26 05:11:25,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:11:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-26 05:11:25,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 145. [2021-08-26 05:11:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.2302158273381294) internal successors, (171), 144 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2021-08-26 05:11:25,361 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 35 [2021-08-26 05:11:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:25,362 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2021-08-26 05:11:25,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2021-08-26 05:11:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 05:11:25,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:25,364 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:25,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:25,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:25,577 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1769158268, now seen corresponding path program 2 times [2021-08-26 05:11:25,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:25,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929445269] [2021-08-26 05:11:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:25,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:25,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:25,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343924831] [2021-08-26 05:11:25,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:11:25,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:25,585 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:25,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 05:11:25,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:11:25,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:11:25,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:25,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:25,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929445269] [2021-08-26 05:11:25,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:25,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343924831] [2021-08-26 05:11:25,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343924831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:25,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:25,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:11:25,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776492680] [2021-08-26 05:11:25,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:11:25,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:11:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:11:25,939 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:25,966 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2021-08-26 05:11:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:11:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-26 05:11:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:25,967 INFO L225 Difference]: With dead ends: 220 [2021-08-26 05:11:25,967 INFO L226 Difference]: Without dead ends: 149 [2021-08-26 05:11:25,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:11:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-26 05:11:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-08-26 05:11:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 143 states have (on average 1.2237762237762237) internal successors, (175), 148 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-08-26 05:11:25,973 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 38 [2021-08-26 05:11:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:25,973 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-08-26 05:11:25,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-08-26 05:11:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-26 05:11:25,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:25,974 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:25,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:26,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 05:11:26,191 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:26,192 INFO L82 PathProgramCache]: Analyzing trace with hash -307935353, now seen corresponding path program 1 times [2021-08-26 05:11:26,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:26,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247103714] [2021-08-26 05:11:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:26,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:26,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:26,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462756300] [2021-08-26 05:11:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:26,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:26,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:26,201 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:26,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 05:11:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:11:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:11:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:26,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:26,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247103714] [2021-08-26 05:11:26,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:26,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462756300] [2021-08-26 05:11:26,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462756300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:26,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:26,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:11:26,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563422652] [2021-08-26 05:11:26,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:11:26,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:26,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:11:26,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:11:26,583 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:26,622 INFO L93 Difference]: Finished difference Result 232 states and 275 transitions. [2021-08-26 05:11:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:11:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-26 05:11:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:26,623 INFO L225 Difference]: With dead ends: 232 [2021-08-26 05:11:26,623 INFO L226 Difference]: Without dead ends: 161 [2021-08-26 05:11:26,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:11:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-26 05:11:26,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-08-26 05:11:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.2091503267973855) internal successors, (185), 158 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 185 transitions. [2021-08-26 05:11:26,631 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 185 transitions. Word has length 43 [2021-08-26 05:11:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:26,631 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 185 transitions. [2021-08-26 05:11:26,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 185 transitions. [2021-08-26 05:11:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 05:11:26,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:26,632 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:26,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-26 05:11:26,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 05:11:26,849 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1736500463, now seen corresponding path program 2 times [2021-08-26 05:11:26,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:26,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355098103] [2021-08-26 05:11:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:26,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:26,858 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:26,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655099301] [2021-08-26 05:11:26,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:11:26,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:26,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:26,861 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:26,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 05:11:27,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:11:27,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:27,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:11:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:27,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:27,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355098103] [2021-08-26 05:11:27,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:27,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655099301] [2021-08-26 05:11:27,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655099301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:27,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:27,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:11:27,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134760738] [2021-08-26 05:11:27,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:11:27,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:11:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:11:27,289 INFO L87 Difference]: Start difference. First operand 159 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:27,323 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2021-08-26 05:11:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:11:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-26 05:11:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:27,325 INFO L225 Difference]: With dead ends: 166 [2021-08-26 05:11:27,325 INFO L226 Difference]: Without dead ends: 162 [2021-08-26 05:11:27,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:11:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-08-26 05:11:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-08-26 05:11:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.205128205128205) internal successors, (188), 161 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-08-26 05:11:27,332 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 44 [2021-08-26 05:11:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:27,332 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-08-26 05:11:27,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-08-26 05:11:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 05:11:27,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:27,333 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:27,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:27,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 05:11:27,551 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash -78776294, now seen corresponding path program 3 times [2021-08-26 05:11:27,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:27,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121521840] [2021-08-26 05:11:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:27,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:27,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:27,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992533666] [2021-08-26 05:11:27,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:11:27,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:27,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:27,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:27,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 05:11:27,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:11:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 05:11:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-26 05:11:28,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:28,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121521840] [2021-08-26 05:11:28,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:28,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992533666] [2021-08-26 05:11:28,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992533666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:28,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:28,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:11:28,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865344928] [2021-08-26 05:11:28,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:11:28,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:11:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:28,235 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:40,052 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2021-08-26 05:11:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:11:40,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-26 05:11:40,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:40,054 INFO L225 Difference]: With dead ends: 188 [2021-08-26 05:11:40,054 INFO L226 Difference]: Without dead ends: 182 [2021-08-26 05:11:40,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5744.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:11:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-26 05:11:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 110. [2021-08-26 05:11:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 109 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-08-26 05:11:40,061 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 44 [2021-08-26 05:11:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:40,061 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-08-26 05:11:40,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-08-26 05:11:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-26 05:11:40,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:40,062 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:40,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:40,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:40,280 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:40,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2002321831, now seen corresponding path program 2 times [2021-08-26 05:11:40,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:40,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003277641] [2021-08-26 05:11:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:40,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:40,295 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:40,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914010992] [2021-08-26 05:11:40,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:11:40,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:40,297 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:40,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 05:11:40,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:11:40,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:40,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 05:11:40,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:41,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:41,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003277641] [2021-08-26 05:11:41,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:41,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914010992] [2021-08-26 05:11:41,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914010992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:41,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:41,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 05:11:41,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995368475] [2021-08-26 05:11:41,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 05:11:41,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 05:11:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:11:41,172 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:41,627 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2021-08-26 05:11:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 05:11:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-26 05:11:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:41,628 INFO L225 Difference]: With dead ends: 157 [2021-08-26 05:11:41,628 INFO L226 Difference]: Without dead ends: 149 [2021-08-26 05:11:41,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-08-26 05:11:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-26 05:11:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-08-26 05:11:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1504424778761062) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-08-26 05:11:41,635 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 45 [2021-08-26 05:11:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:41,635 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-08-26 05:11:41,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-08-26 05:11:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-26 05:11:41,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:41,636 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:41,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:41,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:41,850 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash 762563284, now seen corresponding path program 3 times [2021-08-26 05:11:41,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:41,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312513845] [2021-08-26 05:11:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:41,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:41,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:41,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948708292] [2021-08-26 05:11:41,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:11:41,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:41,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:41,867 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:41,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 05:11:42,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:11:42,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:42,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 05:11:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-26 05:11:42,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:42,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312513845] [2021-08-26 05:11:42,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:42,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948708292] [2021-08-26 05:11:42,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948708292] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:42,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:42,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 05:11:42,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15622581] [2021-08-26 05:11:42,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:11:42,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:11:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:11:42,452 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:42,632 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2021-08-26 05:11:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:11:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-26 05:11:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:42,633 INFO L225 Difference]: With dead ends: 161 [2021-08-26 05:11:42,633 INFO L226 Difference]: Without dead ends: 145 [2021-08-26 05:11:42,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:11:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-26 05:11:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2021-08-26 05:11:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-08-26 05:11:42,640 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 49 [2021-08-26 05:11:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:42,640 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-08-26 05:11:42,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-08-26 05:11:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-26 05:11:42,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:42,641 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:42,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:42,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-26 05:11:42,858 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:42,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1005346468, now seen corresponding path program 2 times [2021-08-26 05:11:42,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:42,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968024276] [2021-08-26 05:11:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:42,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:42,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:42,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042064825] [2021-08-26 05:11:42,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:11:42,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:42,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:42,867 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:42,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 05:11:43,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:11:43,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:43,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 05:11:43,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:43,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:43,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968024276] [2021-08-26 05:11:43,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:43,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042064825] [2021-08-26 05:11:43,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042064825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:43,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:43,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:11:43,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937155117] [2021-08-26 05:11:43,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:11:43,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:11:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:11:43,479 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:43,679 INFO L93 Difference]: Finished difference Result 241 states and 262 transitions. [2021-08-26 05:11:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:11:43,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-26 05:11:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:43,682 INFO L225 Difference]: With dead ends: 241 [2021-08-26 05:11:43,682 INFO L226 Difference]: Without dead ends: 166 [2021-08-26 05:11:43,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:11:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-26 05:11:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2021-08-26 05:11:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 129 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 146 transitions. [2021-08-26 05:11:43,692 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 146 transitions. Word has length 53 [2021-08-26 05:11:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:43,692 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 146 transitions. [2021-08-26 05:11:43,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:43,693 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 146 transitions. [2021-08-26 05:11:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-26 05:11:43,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:43,693 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:43,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:43,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 05:11:43,911 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1869464814, now seen corresponding path program 3 times [2021-08-26 05:11:43,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:43,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268526352] [2021-08-26 05:11:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:43,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:43,916 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:43,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278774586] [2021-08-26 05:11:43,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:11:43,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:43,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:43,918 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:43,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 05:11:44,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:11:44,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 05:11:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-08-26 05:11:44,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:44,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268526352] [2021-08-26 05:11:44,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:44,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278774586] [2021-08-26 05:11:44,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278774586] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:11:44,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:11:44,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 05:11:44,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565303288] [2021-08-26 05:11:44,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:11:44,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:44,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:11:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:11:44,575 INFO L87 Difference]: Start difference. First operand 130 states and 146 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:44,742 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2021-08-26 05:11:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:11:44,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-26 05:11:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:44,743 INFO L225 Difference]: With dead ends: 142 [2021-08-26 05:11:44,743 INFO L226 Difference]: Without dead ends: 120 [2021-08-26 05:11:44,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:11:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-26 05:11:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-08-26 05:11:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.096774193548387) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-08-26 05:11:44,763 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 53 [2021-08-26 05:11:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:44,763 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-08-26 05:11:44,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-08-26 05:11:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-26 05:11:44,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:44,764 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:44,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:44,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:44,981 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:44,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1395693798, now seen corresponding path program 4 times [2021-08-26 05:11:44,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:44,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440320056] [2021-08-26 05:11:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:44,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:44,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:44,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396271053] [2021-08-26 05:11:44,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 05:11:44,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:44,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:44,987 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:44,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 05:11:45,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 05:11:45,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-26 05:11:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:11:46,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:46,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440320056] [2021-08-26 05:11:46,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:46,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396271053] [2021-08-26 05:11:46,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396271053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:46,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:46,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 05:11:46,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829802968] [2021-08-26 05:11:46,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 05:11:46,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 05:11:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:11:46,135 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:11:46,542 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2021-08-26 05:11:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 05:11:46,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-26 05:11:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:11:46,543 INFO L225 Difference]: With dead ends: 170 [2021-08-26 05:11:46,543 INFO L226 Difference]: Without dead ends: 164 [2021-08-26 05:11:46,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-26 05:11:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-26 05:11:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-08-26 05:11:46,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.101010101010101) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-08-26 05:11:46,551 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 54 [2021-08-26 05:11:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:11:46,551 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-08-26 05:11:46,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:11:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-08-26 05:11:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-26 05:11:46,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:11:46,552 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:11:46,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 05:11:46,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:46,771 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:11:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:11:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash 62330478, now seen corresponding path program 3 times [2021-08-26 05:11:46,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:11:46,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754651087] [2021-08-26 05:11:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:11:46,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:11:46,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:11:46,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296309035] [2021-08-26 05:11:46,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:11:46,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:11:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:11:46,781 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:11:46,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 05:11:47,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 05:11:47,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:11:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 05:11:47,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:11:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-26 05:11:47,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:11:47,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754651087] [2021-08-26 05:11:47,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:11:47,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296309035] [2021-08-26 05:11:47,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296309035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:11:47,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:11:47,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:11:47,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9297132] [2021-08-26 05:11:47,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:11:47,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:11:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:11:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:11:47,946 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:00,947 WARN L207 SmtUtils]: Spent 10.08 s on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-08-26 05:12:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:03,244 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-08-26 05:12:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:12:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-26 05:12:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:03,245 INFO L225 Difference]: With dead ends: 120 [2021-08-26 05:12:03,245 INFO L226 Difference]: Without dead ends: 116 [2021-08-26 05:12:03,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 10653.4ms TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:12:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-26 05:12:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-08-26 05:12:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 113 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2021-08-26 05:12:03,254 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 58 [2021-08-26 05:12:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:03,254 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2021-08-26 05:12:03,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2021-08-26 05:12:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-26 05:12:03,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:03,255 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:03,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:03,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-26 05:12:03,472 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1931506154, now seen corresponding path program 1 times [2021-08-26 05:12:03,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:03,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711454026] [2021-08-26 05:12:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:03,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:03,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:03,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047658588] [2021-08-26 05:12:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:03,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:03,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:03,484 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:03,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 05:12:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:12:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:12:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:12:04,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:04,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711454026] [2021-08-26 05:12:04,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:04,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047658588] [2021-08-26 05:12:04,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047658588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:04,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:04,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:12:04,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812661155] [2021-08-26 05:12:04,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:12:04,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:12:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:12:04,248 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:04,322 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2021-08-26 05:12:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:12:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-26 05:12:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:04,323 INFO L225 Difference]: With dead ends: 185 [2021-08-26 05:12:04,323 INFO L226 Difference]: Without dead ends: 129 [2021-08-26 05:12:04,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:12:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-26 05:12:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2021-08-26 05:12:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.096) internal successors, (137), 126 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2021-08-26 05:12:04,354 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 59 [2021-08-26 05:12:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:04,354 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2021-08-26 05:12:04,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2021-08-26 05:12:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-26 05:12:04,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:04,355 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:04,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:04,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 05:12:04,572 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:04,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1646664921, now seen corresponding path program 4 times [2021-08-26 05:12:04,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:04,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808138747] [2021-08-26 05:12:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:04,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:04,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:04,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175034081] [2021-08-26 05:12:04,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 05:12:04,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:04,586 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:04,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 05:12:05,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 05:12:05,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:12:05,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 05:12:05,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:12:06,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:06,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808138747] [2021-08-26 05:12:06,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:06,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175034081] [2021-08-26 05:12:06,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175034081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:06,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:06,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-08-26 05:12:06,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787507213] [2021-08-26 05:12:06,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 05:12:06,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:06,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 05:12:06,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:12:06,009 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:06,437 INFO L93 Difference]: Finished difference Result 252 states and 280 transitions. [2021-08-26 05:12:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 05:12:06,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-26 05:12:06,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:06,438 INFO L225 Difference]: With dead ends: 252 [2021-08-26 05:12:06,438 INFO L226 Difference]: Without dead ends: 185 [2021-08-26 05:12:06,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-26 05:12:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-08-26 05:12:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 137. [2021-08-26 05:12:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0888888888888888) internal successors, (147), 136 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2021-08-26 05:12:06,450 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 63 [2021-08-26 05:12:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:06,450 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2021-08-26 05:12:06,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2021-08-26 05:12:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-26 05:12:06,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:06,451 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:06,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:06,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 05:12:06,665 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1305309061, now seen corresponding path program 5 times [2021-08-26 05:12:06,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:06,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484352884] [2021-08-26 05:12:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:06,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:06,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:06,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326794569] [2021-08-26 05:12:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 05:12:06,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:06,675 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:06,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 05:12:07,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 05:12:07,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:12:07,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 05:12:07,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:12:07,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:07,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484352884] [2021-08-26 05:12:07,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:07,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326794569] [2021-08-26 05:12:07,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326794569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:07,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:07,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:12:07,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687160412] [2021-08-26 05:12:07,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 05:12:07,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 05:12:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:12:07,533 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:07,579 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2021-08-26 05:12:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:12:07,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-26 05:12:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:07,580 INFO L225 Difference]: With dead ends: 161 [2021-08-26 05:12:07,580 INFO L226 Difference]: Without dead ends: 157 [2021-08-26 05:12:07,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:12:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-26 05:12:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2021-08-26 05:12:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 142 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2021-08-26 05:12:07,602 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 64 [2021-08-26 05:12:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:07,603 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2021-08-26 05:12:07,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2021-08-26 05:12:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-26 05:12:07,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:07,603 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:07,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:07,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 05:12:07,822 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1810613891, now seen corresponding path program 3 times [2021-08-26 05:12:07,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:07,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671759623] [2021-08-26 05:12:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:07,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:07,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:07,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105041958] [2021-08-26 05:12:07,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:12:07,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:07,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:07,829 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:07,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 05:12:08,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:12:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:12:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 05:12:08,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-26 05:12:08,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:08,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671759623] [2021-08-26 05:12:08,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:08,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105041958] [2021-08-26 05:12:08,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105041958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:08,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:08,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:12:08,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622742247] [2021-08-26 05:12:08,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:12:08,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:12:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:12:08,785 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:09,041 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2021-08-26 05:12:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:12:09,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-26 05:12:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:09,042 INFO L225 Difference]: With dead ends: 165 [2021-08-26 05:12:09,043 INFO L226 Difference]: Without dead ends: 163 [2021-08-26 05:12:09,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:12:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-26 05:12:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 143. [2021-08-26 05:12:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.099290780141844) internal successors, (155), 142 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2021-08-26 05:12:09,055 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 65 [2021-08-26 05:12:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:09,055 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2021-08-26 05:12:09,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2021-08-26 05:12:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-26 05:12:09,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:09,056 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:09,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:09,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 05:12:09,277 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1696816334, now seen corresponding path program 5 times [2021-08-26 05:12:09,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:09,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169357495] [2021-08-26 05:12:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:09,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:09,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:09,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959920490] [2021-08-26 05:12:09,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 05:12:09,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:09,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:09,297 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:09,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 05:12:10,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 05:12:10,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:12:10,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 05:12:10,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:12:10,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:10,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169357495] [2021-08-26 05:12:10,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:10,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959920490] [2021-08-26 05:12:10,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959920490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:10,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:10,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 05:12:10,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758931794] [2021-08-26 05:12:10,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 05:12:10,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:10,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 05:12:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:12:10,221 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:10,316 INFO L93 Difference]: Finished difference Result 240 states and 264 transitions. [2021-08-26 05:12:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 05:12:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-26 05:12:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:10,317 INFO L225 Difference]: With dead ends: 240 [2021-08-26 05:12:10,317 INFO L226 Difference]: Without dead ends: 168 [2021-08-26 05:12:10,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-26 05:12:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-26 05:12:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2021-08-26 05:12:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 164 states have (on average 1.0853658536585367) internal successors, (178), 165 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 178 transitions. [2021-08-26 05:12:10,331 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 178 transitions. Word has length 73 [2021-08-26 05:12:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:10,331 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 178 transitions. [2021-08-26 05:12:10,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 178 transitions. [2021-08-26 05:12:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-26 05:12:10,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:10,332 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:10,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:10,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:10,550 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:10,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1434964432, now seen corresponding path program 6 times [2021-08-26 05:12:10,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:10,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336907604] [2021-08-26 05:12:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:10,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:10,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:10,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515709052] [2021-08-26 05:12:10,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 05:12:10,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:10,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:10,581 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:10,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 05:12:11,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-26 05:12:11,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:12:11,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 05:12:11,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-08-26 05:12:11,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:11,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336907604] [2021-08-26 05:12:11,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:11,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515709052] [2021-08-26 05:12:11,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515709052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:11,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:11,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:12:11,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024367709] [2021-08-26 05:12:11,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:12:11,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:11,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:12:11,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:12:11,788 INFO L87 Difference]: Start difference. First operand 166 states and 178 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:11,988 INFO L93 Difference]: Finished difference Result 210 states and 226 transitions. [2021-08-26 05:12:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:12:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-08-26 05:12:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:11,989 INFO L225 Difference]: With dead ends: 210 [2021-08-26 05:12:11,989 INFO L226 Difference]: Without dead ends: 206 [2021-08-26 05:12:11,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:12:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-26 05:12:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 163. [2021-08-26 05:12:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.0807453416149069) internal successors, (174), 162 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2021-08-26 05:12:12,009 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 74 [2021-08-26 05:12:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:12,024 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2021-08-26 05:12:12,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2021-08-26 05:12:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-26 05:12:12,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:12,025 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:12,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:12,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-26 05:12:12,241 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash 38042175, now seen corresponding path program 7 times [2021-08-26 05:12:12,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:12,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611072997] [2021-08-26 05:12:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:12,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:12,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:12,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140159709] [2021-08-26 05:12:12,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 05:12:12,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:12,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:12,249 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:12,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 05:12:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:12:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 05:12:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:12:13,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:13,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611072997] [2021-08-26 05:12:13,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:13,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140159709] [2021-08-26 05:12:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140159709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:13,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:13,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 05:12:13,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360331960] [2021-08-26 05:12:13,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:12:13,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:13,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:12:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:12:13,282 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:13,347 INFO L93 Difference]: Finished difference Result 208 states and 221 transitions. [2021-08-26 05:12:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 05:12:13,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-26 05:12:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:13,361 INFO L225 Difference]: With dead ends: 208 [2021-08-26 05:12:13,375 INFO L226 Difference]: Without dead ends: 204 [2021-08-26 05:12:13,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-26 05:12:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-26 05:12:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 172. [2021-08-26 05:12:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.0823529411764705) internal successors, (184), 171 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 184 transitions. [2021-08-26 05:12:13,391 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 184 transitions. Word has length 79 [2021-08-26 05:12:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:13,391 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 184 transitions. [2021-08-26 05:12:13,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 184 transitions. [2021-08-26 05:12:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-26 05:12:13,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:13,392 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:13,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:13,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:13,606 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:13,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1178568761, now seen corresponding path program 4 times [2021-08-26 05:12:13,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:13,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566280602] [2021-08-26 05:12:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:13,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:13,618 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:13,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031926305] [2021-08-26 05:12:13,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 05:12:13,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:13,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:13,619 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:13,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 05:12:14,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 05:12:14,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:12:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 05:12:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:12:15,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:15,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566280602] [2021-08-26 05:12:15,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:15,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031926305] [2021-08-26 05:12:15,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031926305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:15,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:15,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-26 05:12:15,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671048557] [2021-08-26 05:12:15,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 05:12:15,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 05:12:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:12:15,367 INFO L87 Difference]: Start difference. First operand 172 states and 184 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:12:15,784 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2021-08-26 05:12:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 05:12:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-26 05:12:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:12:15,785 INFO L225 Difference]: With dead ends: 197 [2021-08-26 05:12:15,785 INFO L226 Difference]: Without dead ends: 189 [2021-08-26 05:12:15,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-26 05:12:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-26 05:12:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 169. [2021-08-26 05:12:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.0778443113772456) internal successors, (180), 168 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 180 transitions. [2021-08-26 05:12:15,802 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 180 transitions. Word has length 80 [2021-08-26 05:12:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:12:15,802 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 180 transitions. [2021-08-26 05:12:15,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 180 transitions. [2021-08-26 05:12:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-26 05:12:15,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:12:15,803 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:12:15,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-26 05:12:16,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:16,018 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-08-26 05:12:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:12:16,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1490592583, now seen corresponding path program 6 times [2021-08-26 05:12:16,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:12:16,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791420227] [2021-08-26 05:12:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:12:16,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:12:16,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:12:16,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5932102] [2021-08-26 05:12:16,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 05:12:16,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:12:16,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:12:16,029 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:12:16,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-26 05:12:16,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-26 05:12:16,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:12:16,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-26 05:12:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:12:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-26 05:12:18,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:12:18,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791420227] [2021-08-26 05:12:18,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:12:18,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5932102] [2021-08-26 05:12:18,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5932102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:12:18,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:12:18,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-08-26 05:12:18,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883882232] [2021-08-26 05:12:18,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 05:12:18,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:12:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 05:12:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:12:18,760 INFO L87 Difference]: Start difference. First operand 169 states and 180 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:12:33,424 WARN L207 SmtUtils]: Spent 6.01 s on a formula simplification that was a NOOP. DAG size: 24 [2021-08-26 05:12:40,965 WARN L207 SmtUtils]: Spent 7.53 s on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-08-26 05:13:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:13:01,640 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2021-08-26 05:13:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 05:13:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-08-26 05:13:01,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:13:01,641 INFO L225 Difference]: With dead ends: 184 [2021-08-26 05:13:01,641 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 05:13:01,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 26270.9ms TimeCoverageRelationStatistics Valid=140, Invalid=364, Unknown=2, NotChecked=0, Total=506 [2021-08-26 05:13:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 05:13:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 05:13:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:13:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 05:13:01,641 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2021-08-26 05:13:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:13:01,642 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 05:13:01,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:13:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 05:13:01,642 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 05:13:01,643 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:13:01,644 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:13:01,644 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:13:01,644 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:13:01,644 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:13:01,644 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:13:01,644 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:13:01,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-26 05:13:01,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-26 05:13:01,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 05:13:01,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:01,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:02,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:02,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:02,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:02,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:02,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:02,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:02,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:02,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 05:13:19,096 WARN L207 SmtUtils]: Spent 8.18 s on a formula simplification. DAG size of input: 176 DAG size of output: 67 [2021-08-26 05:13:26,295 WARN L207 SmtUtils]: Spent 7.20 s on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2021-08-26 05:13:26,298 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-08-26 05:13:26,298 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-08-26 05:13:26,298 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-08-26 05:13:26,298 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 05:13:26,298 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 05:13:26,298 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-08-26 05:13:26,298 INFO L857 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L853 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (let ((.cse6 (= ULTIMATE.start_assume_abort_if_not_~cond 1))) (let ((.cse7 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2)))))) (.cse8 (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)) (.cse0 (<= 1 ULTIMATE.start_main_~y~0)) (.cse2 (or (and .cse6 (= ULTIMATE.start_main_~a~0 1) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse6 (= ULTIMATE.start_main_~b~0 (* 2 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~a~0 2))))) (let ((.cse1 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))) (.cse3 (< (div (+ (- 1) (* ULTIMATE.start_main_~r~0 (- 1))) (- 2)) (+ ULTIMATE.start_main_~y~0 1))) (.cse4 (or (and .cse6 .cse0 .cse7 .cse8) (and .cse0 .cse2))) (.cse5 (<= (div (* ULTIMATE.start_main_~b~0 (- 1)) (- 2)) ULTIMATE.start_main_~y~0))) (or (and (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) .cse0 .cse1 .cse2) (and .cse3 .cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* 10 ULTIMATE.start_main_~y~0))) .cse5 (= ULTIMATE.start_main_~q~0 10) (<= ~counter~0 8)) (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse4 .cse1) (and .cse6 .cse0 .cse1 .cse7 .cse8) (and (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* 6 ULTIMATE.start_main_~y~0))) .cse3 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~q~0 6) .cse4 .cse5))))) [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point L37-4(lines 37 61) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L853 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (let ((.cse3 (= ULTIMATE.start_main_~a~0 1)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse4 (<= 1 ULTIMATE.start_main_~r~0)) (.cse5 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~q~0 2) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* 2 ULTIMATE.start_main_~y~0))) (< ULTIMATE.start_main_~r~0 (* 2 ULTIMATE.start_main_~b~0)) (<= ~counter~0 4) .cse3 .cse4 .cse6) (and .cse0 .cse1 .cse2 .cse4 .cse5 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L860 garLoopResultBuilder]: At program point L64(lines 23 65) the Hoare annotation is: true [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L853 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0))) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) .cse0 (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) .cse1 (= ULTIMATE.start_main_~q~0 1)) (and .cse0 .cse2 .cse1 .cse3 .cse4 (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)) (and .cse0 (< (div (+ (- 1) (* ULTIMATE.start_main_~r~0 (- 1))) (- 2)) (+ ULTIMATE.start_main_~y~0 1)) .cse2 .cse1 .cse3 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* 10 ULTIMATE.start_main_~y~0))) (<= (div (* ULTIMATE.start_main_~b~0 (- 1)) (- 2)) ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~q~0 10)) (and (let ((.cse5 (* 8 ULTIMATE.start_main_~y~0))) (or (and (< (* 2 ULTIMATE.start_main_~r~0) ULTIMATE.start_main_~x~0) .cse0 .cse2 .cse1 .cse3 (<= .cse5 ULTIMATE.start_main_~x~0) (= (+ ULTIMATE.start_main_~r~0 .cse5) ULTIMATE.start_main_~x~0)) (and .cse0 .cse2 .cse1 .cse3 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~q~0)) (and .cse0 .cse2 .cse1 .cse3 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 (<= (* 6 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~x~0) .cse2 (= ULTIMATE.start_main_~q~0 6) .cse1 .cse3 (< ULTIMATE.start_main_~x~0 .cse5)) (and .cse0 (= (+ ULTIMATE.start_main_~r~0 (* 4 ULTIMATE.start_main_~y~0)) ULTIMATE.start_main_~x~0) .cse2 .cse1 .cse3))) .cse4))) [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point L15-3(lines 15 18) no Hoare annotation was computed. [2021-08-26 05:13:26,299 INFO L853 garLoopResultBuilder]: At program point L15-5(lines 41 42) the Hoare annotation is: (let ((.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse3 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse4 (< (div (+ (- 1) (* ULTIMATE.start_main_~r~0 (- 1))) (- 2)) (+ ULTIMATE.start_main_~y~0 1))) (.cse6 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse5 (<= (div (* ULTIMATE.start_main_~b~0 (- 1)) (- 2)) ULTIMATE.start_main_~y~0))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) .cse3) (and .cse0 .cse4 .cse1 .cse2 .cse3 .cse5) (and (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) .cse0 .cse6 (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) .cse2 (= ULTIMATE.start_main_~q~0 1)) (let ((.cse7 (* 2 ULTIMATE.start_main_~y~0))) (and .cse0 .cse4 .cse6 (= ULTIMATE.start_main_~q~0 2) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 .cse7)) (<= ~counter~0 4) .cse2 (<= .cse7 ULTIMATE.start_main_~x~0) .cse5)))) [2021-08-26 05:13:26,299 INFO L857 garLoopResultBuilder]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L853 garLoopResultBuilder]: At program point L15-8(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L15-9(lines 15 18) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L853 garLoopResultBuilder]: At program point L15-11(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L853 garLoopResultBuilder]: At program point L15-14(lines 51 52) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L15-15(lines 15 18) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L853 garLoopResultBuilder]: At program point L15-17(lines 14 20) the Hoare annotation is: (and (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~r~0))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~a~0 1) .cse2 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) (<= 1 ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))) [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L15-18(lines 15 18) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L860 garLoopResultBuilder]: At program point L15-20(lines 14 20) the Hoare annotation is: true [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 05:13:26,300 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-08-26 05:13:26,303 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 05:13:26,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:13:26 BoogieIcfgContainer [2021-08-26 05:13:26,332 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 05:13:26,349 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 05:13:26,349 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 05:13:26,349 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 05:13:26,350 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:11:16" (3/4) ... [2021-08-26 05:13:26,352 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 05:13:26,358 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-26 05:13:26,358 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 05:13:26,358 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 05:13:26,359 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 05:13:26,397 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 05:13:26,397 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 05:13:26,398 INFO L168 Benchmark]: Toolchain (without parser) took 130146.67 ms. Allocated memory was 58.7 MB in the beginning and 436.2 MB in the end (delta: 377.5 MB). Free memory was 37.3 MB in the beginning and 206.7 MB in the end (delta: -169.4 MB). Peak memory consumption was 208.0 MB. Max. memory is 16.1 GB. [2021-08-26 05:13:26,398 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 40.9 MB in the end (delta: 38.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:13:26,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.77 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 43.3 MB in the end (delta: -6.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 05:13:26,398 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.05 ms. Allocated memory is still 58.7 MB. Free memory was 43.2 MB in the beginning and 41.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:13:26,399 INFO L168 Benchmark]: Boogie Preprocessor took 12.78 ms. Allocated memory is still 58.7 MB. Free memory was 41.7 MB in the beginning and 40.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:13:26,399 INFO L168 Benchmark]: RCFGBuilder took 331.41 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 40.3 MB in the beginning and 59.8 MB in the end (delta: -19.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-26 05:13:26,399 INFO L168 Benchmark]: TraceAbstraction took 129548.41 ms. Allocated memory was 77.6 MB in the beginning and 436.2 MB in the end (delta: 358.6 MB). Free memory was 59.5 MB in the beginning and 209.8 MB in the end (delta: -150.4 MB). Peak memory consumption was 347.3 MB. Max. memory is 16.1 GB. [2021-08-26 05:13:26,399 INFO L168 Benchmark]: Witness Printer took 48.18 ms. Allocated memory is still 436.2 MB. Free memory was 209.8 MB in the beginning and 206.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:13:26,400 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 58.7 MB. Free memory was 41.0 MB in the beginning and 40.9 MB in the end (delta: 38.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.77 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 43.3 MB in the end (delta: -6.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.05 ms. Allocated memory is still 58.7 MB. Free memory was 43.2 MB in the beginning and 41.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.78 ms. Allocated memory is still 58.7 MB. Free memory was 41.7 MB in the beginning and 40.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 331.41 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 40.3 MB in the beginning and 59.8 MB in the end (delta: -19.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 129548.41 ms. Allocated memory was 77.6 MB in the beginning and 436.2 MB in the end (delta: 358.6 MB). Free memory was 59.5 MB in the beginning and 209.8 MB in the end (delta: -150.4 MB). Peak memory consumption was 347.3 MB. Max. memory is 16.1 GB. * Witness Printer took 48.18 ms. Allocated memory is still 436.2 MB. Free memory was 209.8 MB in the beginning and 206.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 129451.6ms, OverallIterations: 34, TraceHistogramMax: 7, EmptinessCheckTime: 42.4ms, AutomataDifference: 74721.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 24444.9ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1111 SDtfs, 2378 SDslu, 3433 SDs, 0 SdLazy, 3865 SolverSat, 742 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 31007.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1550 GetRequests, 1217 SyntacticMatches, 2 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 45217.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=32, InterpolantAutomatonStates: 350, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 313.9ms AutomataMinimizationTime, 34 MinimizatonAttempts, 710 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 130 NumberOfFragments, 985 HoareAnnotationTreeSize, 10 FomulaSimplifications, 1275669414 FormulaSimplificationTreeSizeReduction, 983.8ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 20379414 FormulaSimplificationTreeSizeReductionInter, 23452.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 274.4ms SsaConstructionTime, 699.0ms SatisfiabilityAnalysisTime, 10776.6ms InterpolantComputationTime, 1443 NumberOfCodeBlocks, 1204 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 1409 ConstructedInterpolants, 0 QuantifiedInterpolants, 9146 SizeOfPredicates, 211 NumberOfNonLiveVariables, 4794 ConjunctsInSsa, 560 ConjunctsInUnsatCore, 34 InterpolantComputations, 10 PerfectInterpolantSequences, 461/1499 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && a == 1) && 1 <= r) && b == y) || ((((cond == 1 && 1 == cond) && 1 <= r) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0)) && 1 <= y) && x == r + q * y - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 <= cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 <= cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((((cond == 1 && 1 <= cond) && q == 2) && x == r + 2 * y) && r < 2 * b) && counter <= 4) && a == 1) && 1 <= r) && b == y)) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && 1 <= y) && b == a * y) && x == r + q * y) || (((((cond == 1 && (-1 + r * -1) / -2 < y + 1) && 1 == cond) && 1 <= y) && x == r + q * y) && b * -1 / -2 <= y)) || ((((((x == r + y && cond == 1) && 1 <= cond) && r < y) && b <= y) && 1 <= y) && q == 1)) || ((((((((cond == 1 && (-1 + r * -1) / -2 < y + 1) && 1 <= cond) && q == 2) && x == r + 2 * y) && counter <= 4) && 1 <= y) && 2 * y <= x) && b * -1 / -2 <= y) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((r < y && 1 <= y) && x == r + q * y) && (((cond == 1 && a == 1) && b == y) || ((cond == 1 && b == 2 * y) && a == 2))) || ((((((-1 + r * -1) / -2 < y + 1 && ((((cond == 1 && 1 <= y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) || (1 <= y && (((cond == 1 && a == 1) && b == y) || ((cond == 1 && b == 2 * y) && a == 2))))) && x == r + 10 * y) && b * -1 / -2 <= y) && q == 10) && counter <= 8)) || ((1 == cond && ((((cond == 1 && 1 <= y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) || (1 <= y && (((cond == 1 && a == 1) && b == y) || ((cond == 1 && b == 2 * y) && a == 2))))) && x == r + q * y)) || ((((cond == 1 && 1 <= y) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0)) || (((((x == r + 6 * y && (-1 + r * -1) / -2 < y + 1) && 1 <= cond) && q == 6) && ((((cond == 1 && 1 <= y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) || (1 <= y && (((cond == 1 && a == 1) && b == y) || ((cond == 1 && b == 2 * y) && a == 2))))) && b * -1 / -2 <= y) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((((x == r + y && cond == 1) && r < y) && b <= y) && 1 <= y) && q == 1) || (((((cond == 1 && 1 == cond) && 1 <= y) && b == a * y) && x == r + q * y) && a % -2 == 0)) || (((((((cond == 1 && (-1 + r * -1) / -2 < y + 1) && 1 == cond) && 1 <= y) && b == a * y) && x == r + 10 * y) && b * -1 / -2 <= y) && q == 10)) || (((((((((((2 * r < x && cond == 1) && 1 == cond) && 1 <= y) && b == a * y) && 8 * y <= x) && r + 8 * y == x) || ((((cond == 1 && 1 == cond) && 1 <= y) && b == a * y) && a == q)) || ((((cond == 1 && 1 == cond) && 1 <= y) && b == a * y) && b == y)) || ((((((cond == 1 && 6 * y <= x) && 1 == cond) && q == 6) && 1 <= y) && b == a * y) && x < 8 * y)) || ((((cond == 1 && r + 4 * y == x) && 1 == cond) && 1 <= y) && b == a * y)) && x == r + q * y) RESULT: Ultimate proved your program to be correct! [2021-08-26 05:13:26,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...