./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_20x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/recursive-simple/sum_20x0-1.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 d709c141e865b9e316ae50970f4a7a44b0dfd8eb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:48:36,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:48:36,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:48:36,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:48:36,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:48:36,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:48:36,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:48:36,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:48:36,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:48:36,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:48:36,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:48:36,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:48:36,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:48:36,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:48:36,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:48:36,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:48:36,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:48:36,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:48:36,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:48:36,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:48:36,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:48:36,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:48:36,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:48:36,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:48:36,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:48:36,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:48:36,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:48:36,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:48:36,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:48:36,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:48:36,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:48:36,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:48:36,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:48:36,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:48:36,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:48:36,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:48:36,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:48:36,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:48:36,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:48:36,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:48:36,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:48:36,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:48:36,788 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:48:36,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:48:36,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:48:36,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:48:36,790 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:48:36,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:48:36,791 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:48:36,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:48:36,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:48:36,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:48:36,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:48:36,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:48:36,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:48:36,793 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:48:36,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:48:36,793 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:48:36,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:48:36,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:48:36,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:48:36,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:48:36,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:48:36,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:48:36,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:48:36,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:48:36,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:48:36,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:48:36,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:48:36,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:48:36,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:48:36,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> d709c141e865b9e316ae50970f4a7a44b0dfd8eb [2020-10-20 01:48:37,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:48:37,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:48:37,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:48:37,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:48:37,054 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:48:37,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2020-10-20 01:48:37,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf43ba723/1c0b47738b7943a691b3213b690db3f5/FLAG00b64a36a [2020-10-20 01:48:37,619 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:48:37,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2020-10-20 01:48:37,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf43ba723/1c0b47738b7943a691b3213b690db3f5/FLAG00b64a36a [2020-10-20 01:48:38,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf43ba723/1c0b47738b7943a691b3213b690db3f5 [2020-10-20 01:48:38,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:48:38,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:48:38,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:48:38,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:48:38,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:48:38,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac838c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38, skipping insertion in model container [2020-10-20 01:48:38,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:48:38,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:48:38,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:48:38,298 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:48:38,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:48:38,344 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:48:38,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38 WrapperNode [2020-10-20 01:48:38,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:48:38,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:48:38,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:48:38,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:48:38,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:48:38,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:48:38,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:48:38,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:48:38,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... [2020-10-20 01:48:38,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:48:38,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:48:38,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:48:38,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:48:38,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:48:38,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:48:38,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:48:38,507 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-20 01:48:38,507 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-20 01:48:38,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:48:38,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:48:38,734 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:48:38,735 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:48:38,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:38 BoogieIcfgContainer [2020-10-20 01:48:38,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:48:38,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:48:38,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:48:38,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:48:38,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:48:38" (1/3) ... [2020-10-20 01:48:38,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32aa512f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:48:38, skipping insertion in model container [2020-10-20 01:48:38,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:38" (2/3) ... [2020-10-20 01:48:38,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32aa512f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:48:38, skipping insertion in model container [2020-10-20 01:48:38,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:38" (3/3) ... [2020-10-20 01:48:38,745 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-10-20 01:48:38,760 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:48:38,767 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:48:38,783 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:48:38,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:48:38,818 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:48:38,819 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:48:38,819 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:48:38,822 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:48:38,822 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:48:38,822 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:48:38,822 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:48:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 01:48:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:48:38,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:38,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:38,868 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-10-20 01:48:38,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:38,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537033655] [2020-10-20 01:48:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:48:39,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537033655] [2020-10-20 01:48:39,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:48:39,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:48:39,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873720868] [2020-10-20 01:48:39,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:48:39,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:48:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:48:39,157 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-10-20 01:48:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:39,237 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-20 01:48:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:48:39,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:48:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:39,250 INFO L225 Difference]: With dead ends: 26 [2020-10-20 01:48:39,250 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 01:48:39,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:48:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 01:48:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-20 01:48:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-20 01:48:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-20 01:48:39,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-20 01:48:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:39,291 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-20 01:48:39,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:48:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-20 01:48:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:48:39,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:39,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:39,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:48:39,294 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-10-20 01:48:39,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:39,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974452165] [2020-10-20 01:48:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:48:39,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974452165] [2020-10-20 01:48:39,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036165209] [2020-10-20 01:48:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:48:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:48:39,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:39,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:48:39,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768895365] [2020-10-20 01:48:39,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:48:39,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:39,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:48:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:48:39,588 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-10-20 01:48:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:39,644 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-10-20 01:48:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:48:39,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-20 01:48:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:39,646 INFO L225 Difference]: With dead ends: 22 [2020-10-20 01:48:39,646 INFO L226 Difference]: Without dead ends: 18 [2020-10-20 01:48:39,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:48:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-20 01:48:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-20 01:48:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 01:48:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-20 01:48:39,655 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-20 01:48:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:39,655 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-20 01:48:39,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:48:39,656 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-20 01:48:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 01:48:39,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:39,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:39,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 01:48:39,871 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:39,872 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-10-20 01:48:39,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:39,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235187177] [2020-10-20 01:48:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:48:40,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235187177] [2020-10-20 01:48:40,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664666231] [2020-10-20 01:48:40,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:40,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:48:40,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:40,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:48:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:48:40,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:40,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:48:40,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139081392] [2020-10-20 01:48:40,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:48:40,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:48:40,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:48:40,223 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-10-20 01:48:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:40,289 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-20 01:48:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:48:40,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-20 01:48:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:40,291 INFO L225 Difference]: With dead ends: 25 [2020-10-20 01:48:40,291 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 01:48:40,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:48:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 01:48:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-20 01:48:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 01:48:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-20 01:48:40,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-10-20 01:48:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:40,299 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-20 01:48:40,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:48:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-20 01:48:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 01:48:40,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:40,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:40,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:40,517 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:40,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-10-20 01:48:40,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:40,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644172500] [2020-10-20 01:48:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 01:48:40,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644172500] [2020-10-20 01:48:40,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932196396] [2020-10-20 01:48:40,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:40,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 01:48:40,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:40,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 01:48:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 01:48:40,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:40,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:48:40,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920946958] [2020-10-20 01:48:40,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:48:40,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:40,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:48:40,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:48:40,793 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-10-20 01:48:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:40,884 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-20 01:48:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:48:40,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-20 01:48:40,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:40,886 INFO L225 Difference]: With dead ends: 28 [2020-10-20 01:48:40,886 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 01:48:40,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:48:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 01:48:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 01:48:40,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 01:48:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-20 01:48:40,894 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-10-20 01:48:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:40,894 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-20 01:48:40,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:48:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-20 01:48:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-20 01:48:40,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:40,897 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:41,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:41,111 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:41,112 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-10-20 01:48:41,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:41,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337879868] [2020-10-20 01:48:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-20 01:48:41,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337879868] [2020-10-20 01:48:41,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288081172] [2020-10-20 01:48:41,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:41,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:48:41,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 01:48:41,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-20 01:48:41,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:41,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 01:48:41,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161919150] [2020-10-20 01:48:41,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:48:41,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:41,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:48:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:48:41,375 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-20 01:48:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:41,470 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-20 01:48:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:48:41,471 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-20 01:48:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:41,472 INFO L225 Difference]: With dead ends: 31 [2020-10-20 01:48:41,472 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 01:48:41,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-20 01:48:41,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 01:48:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 01:48:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:48:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-20 01:48:41,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-10-20 01:48:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:41,480 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-20 01:48:41,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:48:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-20 01:48:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-20 01:48:41,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:41,482 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:41,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:41,696 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:41,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-10-20 01:48:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:41,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966991633] [2020-10-20 01:48:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-20 01:48:41,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966991633] [2020-10-20 01:48:41,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968061019] [2020-10-20 01:48:41,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:41,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-20 01:48:41,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:41,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 01:48:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-20 01:48:41,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:41,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 01:48:41,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972375491] [2020-10-20 01:48:41,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 01:48:41,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 01:48:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:48:41,991 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-10-20 01:48:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:42,095 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-20 01:48:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:48:42,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-20 01:48:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:42,097 INFO L225 Difference]: With dead ends: 34 [2020-10-20 01:48:42,097 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 01:48:42,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-20 01:48:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 01:48:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 01:48:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 01:48:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-20 01:48:42,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-10-20 01:48:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:42,105 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-20 01:48:42,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 01:48:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-20 01:48:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-20 01:48:42,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:42,107 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:42,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 01:48:42,323 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:42,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-10-20 01:48:42,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:42,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713783462] [2020-10-20 01:48:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-20 01:48:42,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713783462] [2020-10-20 01:48:42,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720589469] [2020-10-20 01:48:42,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:42,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-20 01:48:42,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 01:48:42,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-20 01:48:42,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:42,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 01:48:42,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580756933] [2020-10-20 01:48:42,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 01:48:42,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 01:48:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:48:42,623 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-10-20 01:48:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:42,719 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-20 01:48:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 01:48:42,720 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-20 01:48:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:42,721 INFO L225 Difference]: With dead ends: 37 [2020-10-20 01:48:42,721 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 01:48:42,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-10-20 01:48:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 01:48:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-20 01:48:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-20 01:48:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-20 01:48:42,728 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-10-20 01:48:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:42,729 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-20 01:48:42,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 01:48:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-20 01:48:42,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-20 01:48:42,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:42,731 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:42,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:42,944 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-10-20 01:48:42,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:42,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693914281] [2020-10-20 01:48:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-20 01:48:43,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693914281] [2020-10-20 01:48:43,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102590484] [2020-10-20 01:48:43,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 01:48:43,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-20 01:48:43,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:43,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 01:48:43,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347379382] [2020-10-20 01:48:43,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 01:48:43,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:43,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 01:48:43,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:48:43,290 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-20 01:48:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:43,435 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-20 01:48:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 01:48:43,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-20 01:48:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:43,437 INFO L225 Difference]: With dead ends: 40 [2020-10-20 01:48:43,437 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 01:48:43,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-10-20 01:48:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 01:48:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-20 01:48:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 01:48:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-20 01:48:43,444 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-10-20 01:48:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:43,445 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-20 01:48:43,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 01:48:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-20 01:48:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-20 01:48:43,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:43,446 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:43,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:43,659 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-10-20 01:48:43,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:43,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911510316] [2020-10-20 01:48:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-20 01:48:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911510316] [2020-10-20 01:48:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630186150] [2020-10-20 01:48:43,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:43,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:48:43,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:43,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 01:48:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-20 01:48:44,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:44,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 01:48:44,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087076548] [2020-10-20 01:48:44,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:48:44,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:48:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:48:44,018 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-10-20 01:48:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:44,139 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-20 01:48:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:48:44,140 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-20 01:48:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:44,142 INFO L225 Difference]: With dead ends: 43 [2020-10-20 01:48:44,142 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 01:48:44,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-10-20 01:48:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 01:48:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-20 01:48:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-20 01:48:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-20 01:48:44,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-10-20 01:48:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:44,149 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-20 01:48:44,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:48:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-20 01:48:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-20 01:48:44,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:44,151 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:44,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-20 01:48:44,366 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:44,367 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-10-20 01:48:44,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:44,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412570867] [2020-10-20 01:48:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-20 01:48:44,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412570867] [2020-10-20 01:48:44,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407367159] [2020-10-20 01:48:44,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:44,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-20 01:48:44,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:44,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 01:48:44,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-20 01:48:44,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:44,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 01:48:44,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931478251] [2020-10-20 01:48:44,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 01:48:44,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 01:48:44,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-20 01:48:44,850 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-10-20 01:48:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:44,982 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-20 01:48:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 01:48:44,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-20 01:48:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:44,984 INFO L225 Difference]: With dead ends: 46 [2020-10-20 01:48:44,984 INFO L226 Difference]: Without dead ends: 42 [2020-10-20 01:48:44,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-10-20 01:48:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-20 01:48:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-20 01:48:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 01:48:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-20 01:48:44,991 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-10-20 01:48:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:44,992 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-20 01:48:44,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 01:48:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-20 01:48:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-20 01:48:44,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:44,994 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:45,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:45,208 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:45,208 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-10-20 01:48:45,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:45,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022511512] [2020-10-20 01:48:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-20 01:48:45,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022511512] [2020-10-20 01:48:45,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466866466] [2020-10-20 01:48:45,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:45,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:48:45,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:45,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 01:48:45,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-20 01:48:45,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:45,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-20 01:48:45,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40233923] [2020-10-20 01:48:45,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 01:48:45,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:45,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 01:48:45,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-10-20 01:48:45,667 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-10-20 01:48:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:45,818 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-20 01:48:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 01:48:45,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-20 01:48:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:45,820 INFO L225 Difference]: With dead ends: 49 [2020-10-20 01:48:45,820 INFO L226 Difference]: Without dead ends: 45 [2020-10-20 01:48:45,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-10-20 01:48:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-20 01:48:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-20 01:48:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 01:48:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-20 01:48:45,827 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-10-20 01:48:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:45,827 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-20 01:48:45,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 01:48:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-20 01:48:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-20 01:48:45,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:45,829 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:46,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:46,030 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-10-20 01:48:46,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:46,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311508474] [2020-10-20 01:48:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-20 01:48:46,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311508474] [2020-10-20 01:48:46,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566846800] [2020-10-20 01:48:46,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:46,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-20 01:48:46,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:46,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 01:48:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-20 01:48:46,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:46,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-20 01:48:46,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266161148] [2020-10-20 01:48:46,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 01:48:46,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:46,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 01:48:46,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-10-20 01:48:46,628 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-10-20 01:48:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:46,814 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-20 01:48:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 01:48:46,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-20 01:48:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:46,816 INFO L225 Difference]: With dead ends: 52 [2020-10-20 01:48:46,816 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 01:48:46,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-10-20 01:48:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 01:48:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-20 01:48:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-20 01:48:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-20 01:48:46,826 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-10-20 01:48:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:46,827 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-20 01:48:46,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 01:48:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-20 01:48:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-20 01:48:46,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:46,831 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:47,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 01:48:47,046 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:47,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-10-20 01:48:47,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:47,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675090394] [2020-10-20 01:48:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-20 01:48:47,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675090394] [2020-10-20 01:48:47,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887269461] [2020-10-20 01:48:47,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:47,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-20 01:48:47,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:47,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 01:48:47,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-20 01:48:47,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:47,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-20 01:48:47,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662402223] [2020-10-20 01:48:47,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 01:48:47,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:47,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 01:48:47,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-10-20 01:48:47,554 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-10-20 01:48:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:47,752 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-20 01:48:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 01:48:47,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-20 01:48:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:47,754 INFO L225 Difference]: With dead ends: 55 [2020-10-20 01:48:47,754 INFO L226 Difference]: Without dead ends: 51 [2020-10-20 01:48:47,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-10-20 01:48:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-20 01:48:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-20 01:48:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-20 01:48:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-20 01:48:47,769 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-10-20 01:48:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:47,770 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-20 01:48:47,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 01:48:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-20 01:48:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-20 01:48:47,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:47,773 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:47,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 01:48:47,983 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-10-20 01:48:47,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:47,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564795596] [2020-10-20 01:48:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-20 01:48:48,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564795596] [2020-10-20 01:48:48,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378507632] [2020-10-20 01:48:48,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 01:48:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-20 01:48:48,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:48,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-20 01:48:48,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183812424] [2020-10-20 01:48:48,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-20 01:48:48,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:48,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 01:48:48,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-10-20 01:48:48,691 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-10-20 01:48:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:48,893 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-20 01:48:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-20 01:48:48,894 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-10-20 01:48:48,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:48,895 INFO L225 Difference]: With dead ends: 58 [2020-10-20 01:48:48,895 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 01:48:48,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 01:48:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 01:48:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-20 01:48:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 01:48:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-20 01:48:48,903 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-10-20 01:48:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:48,904 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-20 01:48:48,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-20 01:48:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-20 01:48:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-20 01:48:48,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:48,906 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:49,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-20 01:48:49,117 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:49,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-10-20 01:48:49,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:49,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998393439] [2020-10-20 01:48:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-20 01:48:49,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998393439] [2020-10-20 01:48:49,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436921359] [2020-10-20 01:48:49,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:49,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:48:49,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-20 01:48:49,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-20 01:48:49,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:49,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 01:48:49,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014581580] [2020-10-20 01:48:49,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 01:48:49,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:49,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 01:48:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-10-20 01:48:49,742 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-10-20 01:48:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:49,951 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-20 01:48:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 01:48:49,952 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-10-20 01:48:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:49,953 INFO L225 Difference]: With dead ends: 61 [2020-10-20 01:48:49,953 INFO L226 Difference]: Without dead ends: 57 [2020-10-20 01:48:49,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-10-20 01:48:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-20 01:48:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-20 01:48:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 01:48:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-20 01:48:49,960 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-10-20 01:48:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:49,960 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-20 01:48:49,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 01:48:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-20 01:48:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-20 01:48:49,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:49,962 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:50,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:50,175 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-10-20 01:48:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:50,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400288943] [2020-10-20 01:48:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-20 01:48:50,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400288943] [2020-10-20 01:48:50,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580932742] [2020-10-20 01:48:50,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:50,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-20 01:48:50,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-20 01:48:50,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-20 01:48:50,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:50,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-20 01:48:50,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194511111] [2020-10-20 01:48:50,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 01:48:50,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 01:48:50,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-10-20 01:48:50,882 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-10-20 01:48:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:51,148 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-20 01:48:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 01:48:51,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-20 01:48:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:51,150 INFO L225 Difference]: With dead ends: 64 [2020-10-20 01:48:51,150 INFO L226 Difference]: Without dead ends: 60 [2020-10-20 01:48:51,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-10-20 01:48:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-20 01:48:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-20 01:48:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-20 01:48:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-20 01:48:51,164 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-10-20 01:48:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:51,165 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-20 01:48:51,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 01:48:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-20 01:48:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-20 01:48:51,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:51,168 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:51,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 01:48:51,381 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash 35426954, now seen corresponding path program 16 times [2020-10-20 01:48:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:51,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27026512] [2020-10-20 01:48:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:51,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-20 01:48:52,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27026512] [2020-10-20 01:48:52,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614781684] [2020-10-20 01:48:52,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:52,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:48:52,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:52,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-20 01:48:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-20 01:48:52,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:52,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-20 01:48:52,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069014443] [2020-10-20 01:48:52,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 01:48:52,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 01:48:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-10-20 01:48:52,228 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-10-20 01:48:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:52,469 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-20 01:48:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 01:48:52,469 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-10-20 01:48:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:52,470 INFO L225 Difference]: With dead ends: 67 [2020-10-20 01:48:52,470 INFO L226 Difference]: Without dead ends: 63 [2020-10-20 01:48:52,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-10-20 01:48:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-20 01:48:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-20 01:48:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-20 01:48:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-20 01:48:52,481 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-10-20 01:48:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:52,481 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-20 01:48:52,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 01:48:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-20 01:48:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-20 01:48:52,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:52,485 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:52,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-20 01:48:52,687 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:52,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1604689196, now seen corresponding path program 17 times [2020-10-20 01:48:52,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:52,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501307308] [2020-10-20 01:48:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:52,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-20 01:48:53,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501307308] [2020-10-20 01:48:53,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67472766] [2020-10-20 01:48:53,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:53,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-20 01:48:53,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-20 01:48:53,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-20 01:48:53,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:53,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-20 01:48:53,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123059157] [2020-10-20 01:48:53,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-20 01:48:53,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 01:48:53,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-10-20 01:48:53,442 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-10-20 01:48:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:53,698 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-20 01:48:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 01:48:53,699 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-10-20 01:48:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:53,700 INFO L225 Difference]: With dead ends: 70 [2020-10-20 01:48:53,700 INFO L226 Difference]: Without dead ends: 66 [2020-10-20 01:48:53,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-10-20 01:48:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-20 01:48:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-20 01:48:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-20 01:48:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-20 01:48:53,709 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-10-20 01:48:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:53,709 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-20 01:48:53,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-20 01:48:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-20 01:48:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-20 01:48:53,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:53,711 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:53,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-20 01:48:53,923 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash 427935434, now seen corresponding path program 18 times [2020-10-20 01:48:53,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:53,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589197720] [2020-10-20 01:48:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:53,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-20 01:48:54,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589197720] [2020-10-20 01:48:54,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046982001] [2020-10-20 01:48:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:54,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-20 01:48:54,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2020-10-20 01:48:54,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-20 01:48:56,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:56,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43] total 63 [2020-10-20 01:48:56,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732612056] [2020-10-20 01:48:56,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-20 01:48:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:56,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-20 01:48:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2020-10-20 01:48:56,253 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 63 states. [2020-10-20 01:48:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:57,772 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-20 01:48:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-20 01:48:57,773 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 118 [2020-10-20 01:48:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:57,774 INFO L225 Difference]: With dead ends: 73 [2020-10-20 01:48:57,774 INFO L226 Difference]: Without dead ends: 69 [2020-10-20 01:48:57,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2020-10-20 01:48:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-20 01:48:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-20 01:48:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-20 01:48:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-20 01:48:57,789 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-10-20 01:48:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:57,789 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-20 01:48:57,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-20 01:48:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-20 01:48:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-20 01:48:57,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:57,791 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:58,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:58,005 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash 653428628, now seen corresponding path program 19 times [2020-10-20 01:48:58,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:58,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275231301] [2020-10-20 01:48:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-20 01:48:58,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275231301] [2020-10-20 01:48:58,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879700949] [2020-10-20 01:48:58,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-20 01:48:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-20 01:48:59,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:59,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-20 01:48:59,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499605869] [2020-10-20 01:48:59,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-20 01:48:59,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-20 01:48:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-10-20 01:48:59,033 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-10-20 01:48:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:59,334 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-20 01:48:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 01:48:59,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-10-20 01:48:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:59,336 INFO L225 Difference]: With dead ends: 76 [2020-10-20 01:48:59,336 INFO L226 Difference]: Without dead ends: 72 [2020-10-20 01:48:59,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-10-20 01:48:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-20 01:48:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-20 01:48:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-20 01:48:59,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-20 01:48:59,343 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-10-20 01:48:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:59,343 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-20 01:48:59,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-20 01:48:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-20 01:48:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-20 01:48:59,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:59,345 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:59,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:59,554 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash -693736694, now seen corresponding path program 20 times [2020-10-20 01:48:59,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:59,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403056584] [2020-10-20 01:48:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:48:59,587 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:48:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:48:59,625 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:48:59,681 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 01:48:59,681 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 01:48:59,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-20 01:48:59,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:48:59 BoogieIcfgContainer [2020-10-20 01:48:59,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:48:59,777 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:48:59,778 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:48:59,778 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:48:59,778 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:38" (3/4) ... [2020-10-20 01:48:59,781 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 01:48:59,854 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:48:59,854 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:48:59,857 INFO L168 Benchmark]: Toolchain (without parser) took 21817.37 ms. Allocated memory was 42.5 MB in the beginning and 172.0 MB in the end (delta: 129.5 MB). Free memory was 22.1 MB in the beginning and 82.4 MB in the end (delta: -60.3 MB). Peak memory consumption was 69.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:59,857 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 32.0 MB. Free memory was 9.7 MB in the beginning and 9.7 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. [2020-10-20 01:48:59,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.94 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 21.1 MB in the beginning and 23.7 MB in the end (delta: -2.6 MB). Peak memory consumption was 12.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:59,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.97 ms. Allocated memory is still 43.0 MB. Free memory was 23.7 MB in the beginning and 22.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:59,859 INFO L168 Benchmark]: Boogie Preprocessor took 31.58 ms. Allocated memory is still 43.0 MB. Free memory was 22.1 MB in the beginning and 21.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:59,859 INFO L168 Benchmark]: RCFGBuilder took 308.80 ms. Allocated memory was 43.0 MB in the beginning and 44.6 MB in the end (delta: 1.6 MB). Free memory was 21.0 MB in the beginning and 26.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:59,860 INFO L168 Benchmark]: TraceAbstraction took 21039.34 ms. Allocated memory was 44.6 MB in the beginning and 172.0 MB in the end (delta: 127.4 MB). Free memory was 26.2 MB in the beginning and 91.0 MB in the end (delta: -64.8 MB). Peak memory consumption was 62.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:59,860 INFO L168 Benchmark]: Witness Printer took 77.12 ms. Allocated memory is still 172.0 MB. Free memory was 91.0 MB in the beginning and 82.4 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:59,863 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 32.0 MB. Free memory was 9.7 MB in the beginning and 9.7 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 293.94 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 21.1 MB in the beginning and 23.7 MB in the end (delta: -2.6 MB). Peak memory consumption was 12.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 48.97 ms. Allocated memory is still 43.0 MB. Free memory was 23.7 MB in the beginning and 22.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 31.58 ms. Allocated memory is still 43.0 MB. Free memory was 22.1 MB in the beginning and 21.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 308.80 ms. Allocated memory was 43.0 MB in the beginning and 44.6 MB in the end (delta: 1.6 MB). Free memory was 21.0 MB in the beginning and 26.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 21039.34 ms. Allocated memory was 44.6 MB in the beginning and 172.0 MB in the end (delta: 127.4 MB). Free memory was 26.2 MB in the beginning and 91.0 MB in the end (delta: -64.8 MB). Peak memory consumption was 62.6 MB. Max. memory is 14.3 GB. * Witness Printer took 77.12 ms. Allocated memory is still 172.0 MB. Free memory was 91.0 MB in the beginning and 82.4 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 20; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L3] __assert_fail("0", "sum_20x0-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.8s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 740 SDslu, 914 SDs, 0 SdLazy, 987 SolverSat, 237 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2230 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 588195 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4522 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...