./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_7.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/locks/test_locks_7.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 d2a1f90505878c0035f7701a954d17ca4375eb05 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 22:24:55,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:24:55,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:24:55,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:24:55,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:24:55,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:24:55,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:24:55,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:24:55,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:24:55,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:24:55,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:24:55,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:24:55,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:24:55,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:24:55,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:24:55,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:24:55,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:24:55,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:24:55,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:24:55,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:24:55,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:24:55,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:24:55,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:24:55,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:24:55,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:24:55,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:24:55,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:24:55,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:24:55,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:24:55,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:24:55,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:24:55,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:24:55,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:24:55,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:24:55,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:24:55,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:24:55,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:24:55,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:24:55,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:24:55,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:24:55,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:24:55,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:24:55,121 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:24:55,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:24:55,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:24:55,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:24:55,123 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:24:55,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:24:55,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:24:55,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:24:55,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:24:55,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:24:55,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:24:55,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:24:55,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:24:55,124 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:24:55,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:24:55,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:24:55,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:24:55,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:24:55,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:24:55,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:24:55,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:24:55,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:24:55,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:24:55,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:24:55,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:24:55,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:24:55,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:24:55,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:24:55,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:24:55,127 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 -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2020-10-19 22:24:55,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:24:55,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:24:55,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:24:55,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:24:55,365 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:24:55,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_7.c [2020-10-19 22:24:55,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee715795/f4eea0b539b84dfd98ee710a6f048330/FLAGfe3ec01d5 [2020-10-19 22:24:55,996 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:24:55,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_7.c [2020-10-19 22:24:56,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee715795/f4eea0b539b84dfd98ee710a6f048330/FLAGfe3ec01d5 [2020-10-19 22:24:56,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee715795/f4eea0b539b84dfd98ee710a6f048330 [2020-10-19 22:24:56,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:24:56,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:24:56,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:24:56,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:24:56,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:24:56,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a39028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56, skipping insertion in model container [2020-10-19 22:24:56,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:24:56,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:24:56,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:24:56,670 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:24:56,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:24:56,708 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:24:56,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56 WrapperNode [2020-10-19 22:24:56,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:24:56,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:24:56,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:24:56,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:24:56,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:24:56,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:24:56,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:24:56,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:24:56,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (1/1) ... [2020-10-19 22:24:56,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:24:56,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:24:56,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:24:56,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:24:56,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (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 [2020-10-19 22:24:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:24:56,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:24:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:24:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:24:57,116 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:24:57,117 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-19 22:24:57,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:57 BoogieIcfgContainer [2020-10-19 22:24:57,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:24:57,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:24:57,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:24:57,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:24:57,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:24:56" (1/3) ... [2020-10-19 22:24:57,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b67173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:24:57, skipping insertion in model container [2020-10-19 22:24:57,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:56" (2/3) ... [2020-10-19 22:24:57,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b67173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:24:57, skipping insertion in model container [2020-10-19 22:24:57,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:57" (3/3) ... [2020-10-19 22:24:57,139 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-10-19 22:24:57,179 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:24:57,195 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:24:57,227 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:24:57,262 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:24:57,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:24:57,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:24:57,263 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:24:57,263 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:24:57,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:24:57,264 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:24:57,264 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:24:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-19 22:24:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:24:57,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:57,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:57,289 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -882170869, now seen corresponding path program 1 times [2020-10-19 22:24:57,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:57,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391729061] [2020-10-19 22:24:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:57,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391729061] [2020-10-19 22:24:57,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:57,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:57,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096326193] [2020-10-19 22:24:57,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:57,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,512 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-19 22:24:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:57,568 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-10-19 22:24:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:57,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-19 22:24:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:57,590 INFO L225 Difference]: With dead ends: 66 [2020-10-19 22:24:57,591 INFO L226 Difference]: Without dead ends: 51 [2020-10-19 22:24:57,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-19 22:24:57,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2020-10-19 22:24:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-19 22:24:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 62 transitions. [2020-10-19 22:24:57,633 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 62 transitions. Word has length 14 [2020-10-19 22:24:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:57,634 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 62 transitions. [2020-10-19 22:24:57,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 62 transitions. [2020-10-19 22:24:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:24:57,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:57,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:57,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:24:57,636 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1275197879, now seen corresponding path program 1 times [2020-10-19 22:24:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:57,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955274833] [2020-10-19 22:24:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:57,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955274833] [2020-10-19 22:24:57,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:57,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:57,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098895293] [2020-10-19 22:24:57,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:57,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:57,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,705 INFO L87 Difference]: Start difference. First operand 35 states and 62 transitions. Second operand 3 states. [2020-10-19 22:24:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:57,730 INFO L93 Difference]: Finished difference Result 84 states and 149 transitions. [2020-10-19 22:24:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:57,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-19 22:24:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:57,732 INFO L225 Difference]: With dead ends: 84 [2020-10-19 22:24:57,732 INFO L226 Difference]: Without dead ends: 51 [2020-10-19 22:24:57,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-19 22:24:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-19 22:24:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-19 22:24:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 86 transitions. [2020-10-19 22:24:57,742 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 86 transitions. Word has length 14 [2020-10-19 22:24:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:57,742 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 86 transitions. [2020-10-19 22:24:57,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 86 transitions. [2020-10-19 22:24:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 22:24:57,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:57,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:57,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:24:57,744 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1577278843, now seen corresponding path program 1 times [2020-10-19 22:24:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:57,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559290677] [2020-10-19 22:24:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:57,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559290677] [2020-10-19 22:24:57,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:57,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:57,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302442092] [2020-10-19 22:24:57,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:57,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:57,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:57,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,811 INFO L87 Difference]: Start difference. First operand 49 states and 86 transitions. Second operand 3 states. [2020-10-19 22:24:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:57,837 INFO L93 Difference]: Finished difference Result 78 states and 132 transitions. [2020-10-19 22:24:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:57,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-19 22:24:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:57,839 INFO L225 Difference]: With dead ends: 78 [2020-10-19 22:24:57,839 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 22:24:57,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 22:24:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-19 22:24:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-19 22:24:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 88 transitions. [2020-10-19 22:24:57,848 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 88 transitions. Word has length 15 [2020-10-19 22:24:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:57,849 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 88 transitions. [2020-10-19 22:24:57,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 88 transitions. [2020-10-19 22:24:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 22:24:57,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:57,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:57,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:24:57,851 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:57,852 INFO L82 PathProgramCache]: Analyzing trace with hash -876214265, now seen corresponding path program 1 times [2020-10-19 22:24:57,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:57,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604566859] [2020-10-19 22:24:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:57,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604566859] [2020-10-19 22:24:57,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:57,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:57,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251255235] [2020-10-19 22:24:57,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:57,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,894 INFO L87 Difference]: Start difference. First operand 52 states and 88 transitions. Second operand 3 states. [2020-10-19 22:24:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:57,913 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2020-10-19 22:24:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:57,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-19 22:24:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:57,916 INFO L225 Difference]: With dead ends: 97 [2020-10-19 22:24:57,916 INFO L226 Difference]: Without dead ends: 95 [2020-10-19 22:24:57,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-19 22:24:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2020-10-19 22:24:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-19 22:24:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-10-19 22:24:57,930 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 15 [2020-10-19 22:24:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:57,930 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-10-19 22:24:57,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-10-19 22:24:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 22:24:57,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:57,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:57,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 22:24:57,934 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1269241275, now seen corresponding path program 1 times [2020-10-19 22:24:57,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:57,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986187459] [2020-10-19 22:24:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:57,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986187459] [2020-10-19 22:24:57,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:57,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834109747] [2020-10-19 22:24:57,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:57,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:57,988 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 3 states. [2020-10-19 22:24:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,009 INFO L93 Difference]: Finished difference Result 161 states and 275 transitions. [2020-10-19 22:24:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-19 22:24:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,011 INFO L225 Difference]: With dead ends: 161 [2020-10-19 22:24:58,011 INFO L226 Difference]: Without dead ends: 97 [2020-10-19 22:24:58,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-19 22:24:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-19 22:24:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-19 22:24:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-10-19 22:24:58,033 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 15 [2020-10-19 22:24:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,034 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-10-19 22:24:58,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-10-19 22:24:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:24:58,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 22:24:58,035 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1392623778, now seen corresponding path program 1 times [2020-10-19 22:24:58,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582275115] [2020-10-19 22:24:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582275115] [2020-10-19 22:24:58,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164865207] [2020-10-19 22:24:58,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,071 INFO L87 Difference]: Start difference. First operand 95 states and 159 transitions. Second operand 3 states. [2020-10-19 22:24:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,091 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-10-19 22:24:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-19 22:24:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,093 INFO L225 Difference]: With dead ends: 144 [2020-10-19 22:24:58,094 INFO L226 Difference]: Without dead ends: 99 [2020-10-19 22:24:58,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-19 22:24:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-19 22:24:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-19 22:24:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2020-10-19 22:24:58,106 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 16 [2020-10-19 22:24:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,107 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2020-10-19 22:24:58,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2020-10-19 22:24:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:24:58,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 22:24:58,108 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash -691559200, now seen corresponding path program 1 times [2020-10-19 22:24:58,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12603728] [2020-10-19 22:24:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12603728] [2020-10-19 22:24:58,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701950064] [2020-10-19 22:24:58,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,143 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand 3 states. [2020-10-19 22:24:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,164 INFO L93 Difference]: Finished difference Result 273 states and 449 transitions. [2020-10-19 22:24:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-19 22:24:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,167 INFO L225 Difference]: With dead ends: 273 [2020-10-19 22:24:58,167 INFO L226 Difference]: Without dead ends: 183 [2020-10-19 22:24:58,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-19 22:24:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-19 22:24:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-19 22:24:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 291 transitions. [2020-10-19 22:24:58,185 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 291 transitions. Word has length 16 [2020-10-19 22:24:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,186 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 291 transitions. [2020-10-19 22:24:58,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 291 transitions. [2020-10-19 22:24:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:24:58,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 22:24:58,188 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,189 INFO L82 PathProgramCache]: Analyzing trace with hash -298532190, now seen corresponding path program 1 times [2020-10-19 22:24:58,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385031631] [2020-10-19 22:24:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385031631] [2020-10-19 22:24:58,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986810040] [2020-10-19 22:24:58,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,239 INFO L87 Difference]: Start difference. First operand 181 states and 291 transitions. Second operand 3 states. [2020-10-19 22:24:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,259 INFO L93 Difference]: Finished difference Result 225 states and 365 transitions. [2020-10-19 22:24:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-19 22:24:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,261 INFO L225 Difference]: With dead ends: 225 [2020-10-19 22:24:58,262 INFO L226 Difference]: Without dead ends: 223 [2020-10-19 22:24:58,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-19 22:24:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2020-10-19 22:24:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-19 22:24:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 287 transitions. [2020-10-19 22:24:58,287 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 287 transitions. Word has length 16 [2020-10-19 22:24:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,288 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 287 transitions. [2020-10-19 22:24:58,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 287 transitions. [2020-10-19 22:24:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:24:58,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 22:24:58,290 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,290 INFO L82 PathProgramCache]: Analyzing trace with hash 36716282, now seen corresponding path program 1 times [2020-10-19 22:24:58,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495788330] [2020-10-19 22:24:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495788330] [2020-10-19 22:24:58,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768053691] [2020-10-19 22:24:58,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,322 INFO L87 Difference]: Start difference. First operand 181 states and 287 transitions. Second operand 3 states. [2020-10-19 22:24:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,344 INFO L93 Difference]: Finished difference Result 325 states and 521 transitions. [2020-10-19 22:24:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-19 22:24:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,347 INFO L225 Difference]: With dead ends: 325 [2020-10-19 22:24:58,347 INFO L226 Difference]: Without dead ends: 323 [2020-10-19 22:24:58,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-19 22:24:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 257. [2020-10-19 22:24:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-19 22:24:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 399 transitions. [2020-10-19 22:24:58,364 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 399 transitions. Word has length 17 [2020-10-19 22:24:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,364 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 399 transitions. [2020-10-19 22:24:58,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 399 transitions. [2020-10-19 22:24:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:24:58,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 22:24:58,367 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash -356310728, now seen corresponding path program 1 times [2020-10-19 22:24:58,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448321924] [2020-10-19 22:24:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448321924] [2020-10-19 22:24:58,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103711101] [2020-10-19 22:24:58,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,404 INFO L87 Difference]: Start difference. First operand 257 states and 399 transitions. Second operand 3 states. [2020-10-19 22:24:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,432 INFO L93 Difference]: Finished difference Result 597 states and 929 transitions. [2020-10-19 22:24:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-19 22:24:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,435 INFO L225 Difference]: With dead ends: 597 [2020-10-19 22:24:58,435 INFO L226 Difference]: Without dead ends: 347 [2020-10-19 22:24:58,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-19 22:24:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2020-10-19 22:24:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-19 22:24:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2020-10-19 22:24:58,455 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 17 [2020-10-19 22:24:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,456 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2020-10-19 22:24:58,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2020-10-19 22:24:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:24:58,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 22:24:58,459 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1138420085, now seen corresponding path program 1 times [2020-10-19 22:24:58,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458862988] [2020-10-19 22:24:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458862988] [2020-10-19 22:24:58,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85698467] [2020-10-19 22:24:58,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,488 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand 3 states. [2020-10-19 22:24:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,511 INFO L93 Difference]: Finished difference Result 525 states and 793 transitions. [2020-10-19 22:24:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-19 22:24:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,514 INFO L225 Difference]: With dead ends: 525 [2020-10-19 22:24:58,514 INFO L226 Difference]: Without dead ends: 359 [2020-10-19 22:24:58,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-19 22:24:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2020-10-19 22:24:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-19 22:24:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 531 transitions. [2020-10-19 22:24:58,530 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 531 transitions. Word has length 18 [2020-10-19 22:24:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,531 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 531 transitions. [2020-10-19 22:24:58,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 531 transitions. [2020-10-19 22:24:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:24:58,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 22:24:58,534 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1839484663, now seen corresponding path program 1 times [2020-10-19 22:24:58,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670455508] [2020-10-19 22:24:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670455508] [2020-10-19 22:24:58,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307408201] [2020-10-19 22:24:58,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,573 INFO L87 Difference]: Start difference. First operand 357 states and 531 transitions. Second operand 3 states. [2020-10-19 22:24:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,600 INFO L93 Difference]: Finished difference Result 617 states and 925 transitions. [2020-10-19 22:24:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-19 22:24:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,604 INFO L225 Difference]: With dead ends: 617 [2020-10-19 22:24:58,604 INFO L226 Difference]: Without dead ends: 615 [2020-10-19 22:24:58,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-10-19 22:24:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 517. [2020-10-19 22:24:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-19 22:24:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 747 transitions. [2020-10-19 22:24:58,623 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 747 transitions. Word has length 18 [2020-10-19 22:24:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,623 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 747 transitions. [2020-10-19 22:24:58,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 747 transitions. [2020-10-19 22:24:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:24:58,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 22:24:58,625 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1446457653, now seen corresponding path program 1 times [2020-10-19 22:24:58,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021835424] [2020-10-19 22:24:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021835424] [2020-10-19 22:24:58,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744190171] [2020-10-19 22:24:58,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,651 INFO L87 Difference]: Start difference. First operand 517 states and 747 transitions. Second operand 3 states. [2020-10-19 22:24:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,679 INFO L93 Difference]: Finished difference Result 1177 states and 1693 transitions. [2020-10-19 22:24:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-19 22:24:58,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,684 INFO L225 Difference]: With dead ends: 1177 [2020-10-19 22:24:58,693 INFO L226 Difference]: Without dead ends: 679 [2020-10-19 22:24:58,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-10-19 22:24:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 677. [2020-10-19 22:24:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-10-19 22:24:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 947 transitions. [2020-10-19 22:24:58,725 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 947 transitions. Word has length 18 [2020-10-19 22:24:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,727 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 947 transitions. [2020-10-19 22:24:58,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 947 transitions. [2020-10-19 22:24:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:24:58,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 22:24:58,740 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1189665389, now seen corresponding path program 1 times [2020-10-19 22:24:58,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654068927] [2020-10-19 22:24:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654068927] [2020-10-19 22:24:58,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436154972] [2020-10-19 22:24:58,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,803 INFO L87 Difference]: Start difference. First operand 677 states and 947 transitions. Second operand 3 states. [2020-10-19 22:24:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,843 INFO L93 Difference]: Finished difference Result 1017 states and 1413 transitions. [2020-10-19 22:24:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-19 22:24:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,848 INFO L225 Difference]: With dead ends: 1017 [2020-10-19 22:24:58,848 INFO L226 Difference]: Without dead ends: 695 [2020-10-19 22:24:58,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-19 22:24:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 693. [2020-10-19 22:24:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-10-19 22:24:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 947 transitions. [2020-10-19 22:24:58,877 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 947 transitions. Word has length 19 [2020-10-19 22:24:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:58,878 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 947 transitions. [2020-10-19 22:24:58,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 947 transitions. [2020-10-19 22:24:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:24:58,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:58,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:58,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 22:24:58,881 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:58,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1890729967, now seen corresponding path program 1 times [2020-10-19 22:24:58,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:58,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282250076] [2020-10-19 22:24:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:58,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282250076] [2020-10-19 22:24:58,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:58,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:58,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406329178] [2020-10-19 22:24:58,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:58,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:58,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:58,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,943 INFO L87 Difference]: Start difference. First operand 693 states and 947 transitions. Second operand 3 states. [2020-10-19 22:24:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:58,974 INFO L93 Difference]: Finished difference Result 1161 states and 1589 transitions. [2020-10-19 22:24:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:58,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-19 22:24:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:58,981 INFO L225 Difference]: With dead ends: 1161 [2020-10-19 22:24:58,981 INFO L226 Difference]: Without dead ends: 1159 [2020-10-19 22:24:58,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-10-19 22:24:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1029. [2020-10-19 22:24:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2020-10-19 22:24:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1363 transitions. [2020-10-19 22:24:59,017 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1363 transitions. Word has length 19 [2020-10-19 22:24:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:59,017 INFO L481 AbstractCegarLoop]: Abstraction has 1029 states and 1363 transitions. [2020-10-19 22:24:59,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1363 transitions. [2020-10-19 22:24:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:24:59,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:59,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:59,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 22:24:59,022 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:59,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1497702957, now seen corresponding path program 1 times [2020-10-19 22:24:59,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:59,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108847845] [2020-10-19 22:24:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:59,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108847845] [2020-10-19 22:24:59,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:59,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94968604] [2020-10-19 22:24:59,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:59,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:59,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:59,083 INFO L87 Difference]: Start difference. First operand 1029 states and 1363 transitions. Second operand 3 states. [2020-10-19 22:24:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:59,118 INFO L93 Difference]: Finished difference Result 2313 states and 3029 transitions. [2020-10-19 22:24:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:59,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-19 22:24:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:59,125 INFO L225 Difference]: With dead ends: 2313 [2020-10-19 22:24:59,126 INFO L226 Difference]: Without dead ends: 1319 [2020-10-19 22:24:59,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2020-10-19 22:24:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2020-10-19 22:24:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1317 states. [2020-10-19 22:24:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1667 transitions. [2020-10-19 22:24:59,168 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1667 transitions. Word has length 19 [2020-10-19 22:24:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:59,168 INFO L481 AbstractCegarLoop]: Abstraction has 1317 states and 1667 transitions. [2020-10-19 22:24:59,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1667 transitions. [2020-10-19 22:24:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:24:59,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:59,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:59,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 22:24:59,171 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:59,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1516697142, now seen corresponding path program 1 times [2020-10-19 22:24:59,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:59,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134238284] [2020-10-19 22:24:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:59,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134238284] [2020-10-19 22:24:59,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:59,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:59,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452602380] [2020-10-19 22:24:59,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:59,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:59,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:59,212 INFO L87 Difference]: Start difference. First operand 1317 states and 1667 transitions. Second operand 3 states. [2020-10-19 22:24:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:59,247 INFO L93 Difference]: Finished difference Result 1977 states and 2485 transitions. [2020-10-19 22:24:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:59,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-19 22:24:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:59,254 INFO L225 Difference]: With dead ends: 1977 [2020-10-19 22:24:59,255 INFO L226 Difference]: Without dead ends: 1351 [2020-10-19 22:24:59,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2020-10-19 22:24:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2020-10-19 22:24:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1349 states. [2020-10-19 22:24:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1667 transitions. [2020-10-19 22:24:59,298 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1667 transitions. Word has length 20 [2020-10-19 22:24:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:59,299 INFO L481 AbstractCegarLoop]: Abstraction has 1349 states and 1667 transitions. [2020-10-19 22:24:59,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1667 transitions. [2020-10-19 22:24:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:24:59,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:59,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:59,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 22:24:59,302 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:59,302 INFO L82 PathProgramCache]: Analyzing trace with hash -815632564, now seen corresponding path program 1 times [2020-10-19 22:24:59,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:59,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805812613] [2020-10-19 22:24:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:59,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805812613] [2020-10-19 22:24:59,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:59,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:59,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559939367] [2020-10-19 22:24:59,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:59,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:59,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:59,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:59,347 INFO L87 Difference]: Start difference. First operand 1349 states and 1667 transitions. Second operand 3 states. [2020-10-19 22:24:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:59,389 INFO L93 Difference]: Finished difference Result 2183 states and 2660 transitions. [2020-10-19 22:24:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:59,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-19 22:24:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:59,400 INFO L225 Difference]: With dead ends: 2183 [2020-10-19 22:24:59,400 INFO L226 Difference]: Without dead ends: 2181 [2020-10-19 22:24:59,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-10-19 22:24:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2053. [2020-10-19 22:24:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2053 states. [2020-10-19 22:24:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 2467 transitions. [2020-10-19 22:24:59,475 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 2467 transitions. Word has length 20 [2020-10-19 22:24:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:59,475 INFO L481 AbstractCegarLoop]: Abstraction has 2053 states and 2467 transitions. [2020-10-19 22:24:59,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 2467 transitions. [2020-10-19 22:24:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:24:59,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:59,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:59,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 22:24:59,479 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:59,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1208659574, now seen corresponding path program 1 times [2020-10-19 22:24:59,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:59,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718731463] [2020-10-19 22:24:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:59,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718731463] [2020-10-19 22:24:59,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:59,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:59,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685520148] [2020-10-19 22:24:59,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:59,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:59,503 INFO L87 Difference]: Start difference. First operand 2053 states and 2467 transitions. Second operand 3 states. [2020-10-19 22:24:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:59,584 INFO L93 Difference]: Finished difference Result 4549 states and 5347 transitions. [2020-10-19 22:24:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:59,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-19 22:24:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:59,585 INFO L225 Difference]: With dead ends: 4549 [2020-10-19 22:24:59,585 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 22:24:59,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 22:24:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 22:24:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 22:24:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 22:24:59,592 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-10-19 22:24:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:59,593 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 22:24:59,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 22:24:59,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 22:24:59,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 22:24:59,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-19 22:24:59,619 INFO L274 CegarLoopResult]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,619 INFO L274 CegarLoopResult]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,619 INFO L274 CegarLoopResult]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,619 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-19 22:24:59,620 INFO L274 CegarLoopResult]: For program point L94(line 94) no Hoare annotation was computed. [2020-10-19 22:24:59,620 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-19 22:24:59,620 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-19 22:24:59,620 INFO L274 CegarLoopResult]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,620 INFO L277 CegarLoopResult]: At program point L119(lines 7 123) the Hoare annotation is: true [2020-10-19 22:24:59,621 INFO L274 CegarLoopResult]: For program point L53(lines 53 55) no Hoare annotation was computed. [2020-10-19 22:24:59,621 INFO L274 CegarLoopResult]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,621 INFO L274 CegarLoopResult]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,621 INFO L274 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-10-19 22:24:59,621 INFO L274 CegarLoopResult]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,621 INFO L277 CegarLoopResult]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2020-10-19 22:24:59,622 INFO L277 CegarLoopResult]: At program point L122(lines 6 123) the Hoare annotation is: true [2020-10-19 22:24:59,622 INFO L274 CegarLoopResult]: For program point L89(line 89) no Hoare annotation was computed. [2020-10-19 22:24:59,622 INFO L274 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-10-19 22:24:59,622 INFO L270 CegarLoopResult]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2020-10-19 22:24:59,622 INFO L274 CegarLoopResult]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,622 INFO L274 CegarLoopResult]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,623 INFO L274 CegarLoopResult]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,623 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-19 22:24:59,623 INFO L274 CegarLoopResult]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,623 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-19 22:24:59,623 INFO L274 CegarLoopResult]: For program point L99(line 99) no Hoare annotation was computed. [2020-10-19 22:24:59,623 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-19 22:24:59,623 INFO L274 CegarLoopResult]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,623 INFO L274 CegarLoopResult]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2020-10-19 22:24:59,624 INFO L274 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-10-19 22:24:59,624 INFO L274 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-10-19 22:24:59,624 INFO L274 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-10-19 22:24:59,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:24:59 BoogieIcfgContainer [2020-10-19 22:24:59,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:24:59,640 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:24:59,640 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:24:59,641 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:24:59,641 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:57" (3/4) ... [2020-10-19 22:24:59,646 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 22:24:59,668 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-19 22:24:59,668 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 22:24:59,669 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 22:24:59,669 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 22:24:59,757 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:24:59,757 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:24:59,760 INFO L168 Benchmark]: Toolchain (without parser) took 3443.67 ms. Allocated memory was 35.1 MB in the beginning and 70.3 MB in the end (delta: 35.1 MB). Free memory was 13.5 MB in the beginning and 50.0 MB in the end (delta: -36.5 MB). Peak memory consumption was 35.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:59,760 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 33.6 MB. Free memory is still 19.3 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:24:59,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.23 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 12.6 MB in the beginning and 24.5 MB in the end (delta: -11.9 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:59,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.83 ms. Allocated memory is still 44.0 MB. Free memory was 24.5 MB in the beginning and 22.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:59,762 INFO L168 Benchmark]: Boogie Preprocessor took 31.60 ms. Allocated memory is still 44.0 MB. Free memory was 22.7 MB in the beginning and 21.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:59,762 INFO L168 Benchmark]: RCFGBuilder took 340.61 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 21.2 MB in the beginning and 15.2 MB in the end (delta: 6.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:59,763 INFO L168 Benchmark]: TraceAbstraction took 2519.23 ms. Allocated memory was 45.6 MB in the beginning and 62.4 MB in the end (delta: 16.8 MB). Free memory was 14.5 MB in the beginning and 9.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 21.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:59,763 INFO L168 Benchmark]: Witness Printer took 117.29 ms. Allocated memory was 62.4 MB in the beginning and 70.3 MB in the end (delta: 7.9 MB). Free memory was 9.6 MB in the beginning and 50.0 MB in the end (delta: -40.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:59,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 33.6 MB. Free memory is still 19.3 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 387.23 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 12.6 MB in the beginning and 24.5 MB in the end (delta: -11.9 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 36.83 ms. Allocated memory is still 44.0 MB. Free memory was 24.5 MB in the beginning and 22.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 31.60 ms. Allocated memory is still 44.0 MB. Free memory was 22.7 MB in the beginning and 21.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 340.61 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 21.2 MB in the beginning and 15.2 MB in the end (delta: 6.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2519.23 ms. Allocated memory was 45.6 MB in the beginning and 62.4 MB in the end (delta: 16.8 MB). Free memory was 14.5 MB in the beginning and 9.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 21.7 MB. Max. memory is 14.3 GB. * Witness Printer took 117.29 ms. Allocated memory was 62.4 MB in the beginning and 70.3 MB in the end (delta: 7.9 MB). Free memory was 9.6 MB in the beginning and 50.0 MB in the end (delta: -40.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1128 SDtfs, 543 SDslu, 729 SDs, 0 SdLazy, 101 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2053occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 137 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 326 NumberOfCodeBlocks, 326 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 10138 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...