./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_3.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/loop-simple/nested_3.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 e63f4150318242871d0ac34a0d1b61fbf23907ae ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:09:24,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:09:24,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:09:24,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:09:24,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:09:24,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:09:24,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:09:24,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:09:24,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:09:24,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:09:24,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:09:24,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:09:24,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:09:24,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:09:24,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:09:24,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:09:24,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:09:24,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:09:24,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:09:24,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:09:24,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:09:24,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:09:24,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:09:24,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:09:24,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:09:24,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:09:24,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:09:24,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:09:24,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:09:25,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:09:25,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:09:25,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:09:25,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:09:25,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:09:25,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:09:25,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:09:25,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:09:25,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:09:25,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:09:25,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:09:25,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:09:25,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:09:25,065 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:09:25,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:09:25,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:09:25,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:09:25,069 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:09:25,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:09:25,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:09:25,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:09:25,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:09:25,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:09:25,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:09:25,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:09:25,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:09:25,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:09:25,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:09:25,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:09:25,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:09:25,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:09:25,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:09:25,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:09:25,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:09:25,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:09:25,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:09:25,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:09:25,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:09:25,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:09:25,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:09:25,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:09:25,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:09:25,077 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 -> e63f4150318242871d0ac34a0d1b61fbf23907ae [2020-10-20 01:09:25,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:09:25,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:09:25,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:09:25,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:09:25,336 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:09:25,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_3.c [2020-10-20 01:09:25,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c308d0b/059fddff03a845f8bf462eac0b094986/FLAG507f79791 [2020-10-20 01:09:25,911 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:09:25,912 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_3.c [2020-10-20 01:09:25,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c308d0b/059fddff03a845f8bf462eac0b094986/FLAG507f79791 [2020-10-20 01:09:26,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c308d0b/059fddff03a845f8bf462eac0b094986 [2020-10-20 01:09:26,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:09:26,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:09:26,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:26,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:09:26,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:09:26,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b88bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26, skipping insertion in model container [2020-10-20 01:09:26,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:09:26,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:09:26,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:26,753 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:09:26,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:26,779 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:09:26,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26 WrapperNode [2020-10-20 01:09:26,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:26,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:26,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:09:26,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:09:26,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:26,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:09:26,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:09:26,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:09:26,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:09:26,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:09:26,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:09:26,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:09:26,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:09:26,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:09:26,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:09:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:09:26,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:09:27,125 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:09:27,125 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 01:09:27,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:27 BoogieIcfgContainer [2020-10-20 01:09:27,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:09:27,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:09:27,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:09:27,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:09:27,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:09:26" (1/3) ... [2020-10-20 01:09:27,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a55fb2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:27, skipping insertion in model container [2020-10-20 01:09:27,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (2/3) ... [2020-10-20 01:09:27,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a55fb2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:27, skipping insertion in model container [2020-10-20 01:09:27,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:27" (3/3) ... [2020-10-20 01:09:27,137 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.c [2020-10-20 01:09:27,149 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:09:27,156 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:09:27,171 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:09:27,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:09:27,194 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:09:27,194 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:09:27,195 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:09:27,195 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:09:27,196 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:09:27,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:09:27,196 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:09:27,211 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 01:09:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 01:09:27,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 01:09:27,217 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,223 INFO L82 PathProgramCache]: Analyzing trace with hash 28726596, now seen corresponding path program 1 times [2020-10-20 01:09:27,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172043409] [2020-10-20 01:09:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172043409] [2020-10-20 01:09:27,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:27,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 01:09:27,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413120963] [2020-10-20 01:09:27,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 01:09:27,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:27,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 01:09:27,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:09:27,393 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 01:09:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:27,410 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-10-20 01:09:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 01:09:27,412 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-10-20 01:09:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:27,422 INFO L225 Difference]: With dead ends: 28 [2020-10-20 01:09:27,422 INFO L226 Difference]: Without dead ends: 11 [2020-10-20 01:09:27,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:09:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-20 01:09:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-20 01:09:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 01:09:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-10-20 01:09:27,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2020-10-20 01:09:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:27,460 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-10-20 01:09:27,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 01:09:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-10-20 01:09:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 01:09:27,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 01:09:27,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:09:27,462 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash 28697766, now seen corresponding path program 1 times [2020-10-20 01:09:27,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846236095] [2020-10-20 01:09:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846236095] [2020-10-20 01:09:27,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:27,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:27,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436113458] [2020-10-20 01:09:27,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:27,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:27,518 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2020-10-20 01:09:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:27,550 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-10-20 01:09:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:27,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-10-20 01:09:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:27,551 INFO L225 Difference]: With dead ends: 20 [2020-10-20 01:09:27,552 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 01:09:27,553 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 [2020-10-20 01:09:27,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 01:09:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2020-10-20 01:09:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 01:09:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-10-20 01:09:27,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2020-10-20 01:09:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:27,557 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-10-20 01:09:27,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-10-20 01:09:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 01:09:27,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:27,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:09:27,559 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash 269702254, now seen corresponding path program 1 times [2020-10-20 01:09:27,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357980723] [2020-10-20 01:09:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357980723] [2020-10-20 01:09:27,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:27,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:27,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467027237] [2020-10-20 01:09:27,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:27,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:27,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:27,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:27,620 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-10-20 01:09:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:27,682 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-10-20 01:09:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:27,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-20 01:09:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:27,684 INFO L225 Difference]: With dead ends: 25 [2020-10-20 01:09:27,684 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 01:09:27,685 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 [2020-10-20 01:09:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 01:09:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2020-10-20 01:09:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 01:09:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-10-20 01:09:27,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2020-10-20 01:09:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:27,698 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-10-20 01:09:27,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-10-20 01:09:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:09:27,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:27,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 01:09:27,699 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash 904437762, now seen corresponding path program 1 times [2020-10-20 01:09:27,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612722826] [2020-10-20 01:09:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612722826] [2020-10-20 01:09:27,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:27,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:27,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173344058] [2020-10-20 01:09:27,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:27,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:27,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:27,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:27,748 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-10-20 01:09:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:27,766 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-10-20 01:09:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:27,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 01:09:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:27,768 INFO L225 Difference]: With dead ends: 25 [2020-10-20 01:09:27,768 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 01:09:27,769 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 [2020-10-20 01:09:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 01:09:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-20 01:09:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 01:09:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-20 01:09:27,773 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2020-10-20 01:09:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:27,773 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-20 01:09:27,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-20 01:09:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 01:09:27,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:27,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 01:09:27,775 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2012164800, now seen corresponding path program 1 times [2020-10-20 01:09:27,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426404520] [2020-10-20 01:09:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426404520] [2020-10-20 01:09:27,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706952319] [2020-10-20 01:09:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 01:09:27,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:27,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 01:09:27,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068318452] [2020-10-20 01:09:27,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:09:27,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:27,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:09:27,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:09:27,940 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-10-20 01:09:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:27,973 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-20 01:09:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 01:09:27,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-20 01:09:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:27,975 INFO L225 Difference]: With dead ends: 28 [2020-10-20 01:09:27,975 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 01:09:27,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:09:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 01:09:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-20 01:09:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 01:09:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-20 01:09:27,983 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-10-20 01:09:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:27,984 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-20 01:09:27,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:09:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-20 01:09:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 01:09:27,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:28,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash -253582594, now seen corresponding path program 2 times [2020-10-20 01:09:28,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824317496] [2020-10-20 01:09:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 01:09:28,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824317496] [2020-10-20 01:09:28,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329723746] [2020-10-20 01:09:28,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:28,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:28,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:28,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:28,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:28,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-20 01:09:28,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661301371] [2020-10-20 01:09:28,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:28,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:28,365 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-10-20 01:09:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,490 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-10-20 01:09:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:09:28,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-20 01:09:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,492 INFO L225 Difference]: With dead ends: 51 [2020-10-20 01:09:28,492 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 01:09:28,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:09:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 01:09:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-20 01:09:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:09:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-20 01:09:28,500 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-10-20 01:09:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,500 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-20 01:09:28,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-20 01:09:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 01:09:28,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,501 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:28,715 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash -311567314, now seen corresponding path program 3 times [2020-10-20 01:09:28,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281662111] [2020-10-20 01:09:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-20 01:09:28,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281662111] [2020-10-20 01:09:28,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737099683] [2020-10-20 01:09:28,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:28,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-20 01:09:28,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:28,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 01:09:28,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-20 01:09:28,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:28,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 01:09:28,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850126842] [2020-10-20 01:09:28,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:09:28,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:09:28,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:09:28,862 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-20 01:09:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,898 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-10-20 01:09:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 01:09:28,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-20 01:09:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,904 INFO L225 Difference]: With dead ends: 71 [2020-10-20 01:09:28,904 INFO L226 Difference]: Without dead ends: 68 [2020-10-20 01:09:28,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:09:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-20 01:09:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-20 01:09:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-20 01:09:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-20 01:09:28,924 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 26 [2020-10-20 01:09:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,925 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-20 01:09:28,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:09:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-20 01:09:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-20 01:09:28,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,928 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:29,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:29,147 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash -936285786, now seen corresponding path program 4 times [2020-10-20 01:09:29,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:29,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507211942] [2020-10-20 01:09:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-20 01:09:29,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507211942] [2020-10-20 01:09:29,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157774012] [2020-10-20 01:09:29,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:29,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:09:29,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:09:29,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-20 01:09:29,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:29,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:09:29,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839942265] [2020-10-20 01:09:29,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:29,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:29,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:29,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:29,358 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-10-20 01:09:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:29,409 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2020-10-20 01:09:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:29,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-20 01:09:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:29,411 INFO L225 Difference]: With dead ends: 97 [2020-10-20 01:09:29,411 INFO L226 Difference]: Without dead ends: 60 [2020-10-20 01:09:29,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-20 01:09:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-20 01:09:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-20 01:09:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-20 01:09:29,433 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2020-10-20 01:09:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:29,433 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-20 01:09:29,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-20 01:09:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-20 01:09:29,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:29,438 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:29,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:29,653 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1097513562, now seen corresponding path program 5 times [2020-10-20 01:09:29,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:29,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840756803] [2020-10-20 01:09:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-20 01:09:29,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840756803] [2020-10-20 01:09:29,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594561422] [2020-10-20 01:09:29,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:29,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-20 01:09:29,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:09:29,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 218 proven. 16 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-10-20 01:09:29,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:29,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:29,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484500178] [2020-10-20 01:09:29,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:29,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:29,824 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 8 states. [2020-10-20 01:09:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:29,913 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-10-20 01:09:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:29,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-20 01:09:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:29,915 INFO L225 Difference]: With dead ends: 111 [2020-10-20 01:09:29,915 INFO L226 Difference]: Without dead ends: 68 [2020-10-20 01:09:29,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-20 01:09:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-20 01:09:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 01:09:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-20 01:09:29,941 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 55 [2020-10-20 01:09:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:29,942 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-20 01:09:29,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-20 01:09:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-20 01:09:29,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:29,948 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:30,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,149 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:30,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1691369894, now seen corresponding path program 6 times [2020-10-20 01:09:30,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:30,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546486989] [2020-10-20 01:09:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 190 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-20 01:09:30,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546486989] [2020-10-20 01:09:30,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769906313] [2020-10-20 01:09:30,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-20 01:09:30,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:30,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:09:30,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 318 proven. 25 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-20 01:09:30,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:30,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:09:30,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263835744] [2020-10-20 01:09:30,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:09:30,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:09:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:30,326 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 9 states. [2020-10-20 01:09:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:30,372 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-10-20 01:09:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:09:30,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-20 01:09:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:30,374 INFO L225 Difference]: With dead ends: 121 [2020-10-20 01:09:30,374 INFO L226 Difference]: Without dead ends: 72 [2020-10-20 01:09:30,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-20 01:09:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-20 01:09:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-20 01:09:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-20 01:09:30,384 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 63 [2020-10-20 01:09:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:30,385 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-20 01:09:30,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:09:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-20 01:09:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-20 01:09:30,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:30,387 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:30,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,601 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1900076454, now seen corresponding path program 7 times [2020-10-20 01:09:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:30,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101207933] [2020-10-20 01:09:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-20 01:09:30,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101207933] [2020-10-20 01:09:30,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738207733] [2020-10-20 01:09:30,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:30,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-20 01:09:30,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:30,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 01:09:30,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172939445] [2020-10-20 01:09:30,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:09:30,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:30,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:09:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:30,760 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 6 states. [2020-10-20 01:09:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:30,785 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2020-10-20 01:09:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:09:30,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-20 01:09:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:30,787 INFO L225 Difference]: With dead ends: 168 [2020-10-20 01:09:30,787 INFO L226 Difference]: Without dead ends: 130 [2020-10-20 01:09:30,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-20 01:09:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2020-10-20 01:09:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-20 01:09:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-10-20 01:09:30,817 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 71 [2020-10-20 01:09:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:30,818 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-10-20 01:09:30,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:09:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-10-20 01:09:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-20 01:09:30,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:30,820 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:31,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:31,028 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1075796806, now seen corresponding path program 8 times [2020-10-20 01:09:31,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:31,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79681634] [2020-10-20 01:09:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2020-10-20 01:09:31,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79681634] [2020-10-20 01:09:31,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235158489] [2020-10-20 01:09:31,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:31,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:31,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:09:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2020-10-20 01:09:31,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:31,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:09:31,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728369145] [2020-10-20 01:09:31,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:31,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:31,234 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 7 states. [2020-10-20 01:09:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:31,286 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2020-10-20 01:09:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:31,287 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-20 01:09:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:31,289 INFO L225 Difference]: With dead ends: 213 [2020-10-20 01:09:31,289 INFO L226 Difference]: Without dead ends: 160 [2020-10-20 01:09:31,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-20 01:09:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2020-10-20 01:09:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-20 01:09:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-10-20 01:09:31,320 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 101 [2020-10-20 01:09:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:31,322 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-10-20 01:09:31,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-10-20 01:09:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-20 01:09:31,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:31,328 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:31,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 01:09:31,529 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash -538489946, now seen corresponding path program 9 times [2020-10-20 01:09:31,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:31,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959010780] [2020-10-20 01:09:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1403 proven. 526 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-10-20 01:09:31,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959010780] [2020-10-20 01:09:31,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652743441] [2020-10-20 01:09:31,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:31,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2020-10-20 01:09:31,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:09:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1404 proven. 526 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2020-10-20 01:09:31,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:31,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:31,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214227825] [2020-10-20 01:09:31,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:31,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:31,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:31,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:31,775 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 8 states. [2020-10-20 01:09:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:31,815 INFO L93 Difference]: Finished difference Result 258 states and 279 transitions. [2020-10-20 01:09:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:31,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-10-20 01:09:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:31,817 INFO L225 Difference]: With dead ends: 258 [2020-10-20 01:09:31,818 INFO L226 Difference]: Without dead ends: 190 [2020-10-20 01:09:31,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-20 01:09:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 162. [2020-10-20 01:09:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-20 01:09:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 174 transitions. [2020-10-20 01:09:31,831 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 174 transitions. Word has length 131 [2020-10-20 01:09:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:31,832 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 174 transitions. [2020-10-20 01:09:31,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 174 transitions. [2020-10-20 01:09:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-20 01:09:31,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:31,840 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:32,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:32,055 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:32,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:32,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1069707590, now seen corresponding path program 10 times [2020-10-20 01:09:32,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:32,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751722302] [2020-10-20 01:09:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4300 backedges. 2188 proven. 875 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2020-10-20 01:09:32,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751722302] [2020-10-20 01:09:32,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440877855] [2020-10-20 01:09:32,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:32,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:09:32,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:32,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:09:32,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4300 backedges. 2188 proven. 875 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2020-10-20 01:09:32,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:32,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:09:32,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197095171] [2020-10-20 01:09:32,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:09:32,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:09:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:32,327 INFO L87 Difference]: Start difference. First operand 162 states and 174 transitions. Second operand 9 states. [2020-10-20 01:09:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:32,381 INFO L93 Difference]: Finished difference Result 275 states and 297 transitions. [2020-10-20 01:09:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:09:32,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 161 [2020-10-20 01:09:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:32,383 INFO L225 Difference]: With dead ends: 275 [2020-10-20 01:09:32,383 INFO L226 Difference]: Without dead ends: 192 [2020-10-20 01:09:32,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-20 01:09:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-20 01:09:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-20 01:09:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 206 transitions. [2020-10-20 01:09:32,396 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 206 transitions. Word has length 161 [2020-10-20 01:09:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:32,397 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 206 transitions. [2020-10-20 01:09:32,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:09:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 206 transitions. [2020-10-20 01:09:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-20 01:09:32,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:32,399 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:32,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:32,613 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:32,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:32,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1969636954, now seen corresponding path program 11 times [2020-10-20 01:09:32,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:32,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371890031] [2020-10-20 01:09:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2020-10-20 01:09:32,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371890031] [2020-10-20 01:09:32,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063264012] [2020-10-20 01:09:32,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:32,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2020-10-20 01:09:32,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2020-10-20 01:09:33,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:33,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 01:09:33,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322721332] [2020-10-20 01:09:33,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:09:33,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:33,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:09:33,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:33,067 INFO L87 Difference]: Start difference. First operand 192 states and 206 transitions. Second operand 6 states. [2020-10-20 01:09:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:33,129 INFO L93 Difference]: Finished difference Result 380 states and 408 transitions. [2020-10-20 01:09:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:09:33,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2020-10-20 01:09:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:33,133 INFO L225 Difference]: With dead ends: 380 [2020-10-20 01:09:33,133 INFO L226 Difference]: Without dead ends: 377 [2020-10-20 01:09:33,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-20 01:09:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 285. [2020-10-20 01:09:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-20 01:09:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2020-10-20 01:09:33,168 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 191 [2020-10-20 01:09:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:33,169 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2020-10-20 01:09:33,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:09:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2020-10-20 01:09:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-20 01:09:33,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:33,177 INFO L422 BasicCegarLoop]: trace histogram [108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-10-20 01:09:33,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 01:09:33,392 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:33,393 INFO L82 PathProgramCache]: Analyzing trace with hash -148194194, now seen corresponding path program 12 times [2020-10-20 01:09:33,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:33,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563891470] [2020-10-20 01:09:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 9444 refuted. 0 times theorem prover too weak. 4581 trivial. 0 not checked. [2020-10-20 01:09:33,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563891470] [2020-10-20 01:09:33,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173682554] [2020-10-20 01:09:33,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:34,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2020-10-20 01:09:34,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:34,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:09:34,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 9444 refuted. 0 times theorem prover too weak. 4581 trivial. 0 not checked. [2020-10-20 01:09:34,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:34,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:09:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432279337] [2020-10-20 01:09:34,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:34,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:34,209 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand 7 states. [2020-10-20 01:09:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:34,254 INFO L93 Difference]: Finished difference Result 473 states and 508 transitions. [2020-10-20 01:09:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:34,255 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2020-10-20 01:09:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:34,258 INFO L225 Difference]: With dead ends: 473 [2020-10-20 01:09:34,259 INFO L226 Difference]: Without dead ends: 470 [2020-10-20 01:09:34,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-10-20 01:09:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 378. [2020-10-20 01:09:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-20 01:09:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 406 transitions. [2020-10-20 01:09:34,288 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 406 transitions. Word has length 284 [2020-10-20 01:09:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:34,289 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 406 transitions. [2020-10-20 01:09:34,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 406 transitions. [2020-10-20 01:09:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-20 01:09:34,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:34,295 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2020-10-20 01:09:34,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 01:09:34,511 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:34,512 INFO L82 PathProgramCache]: Analyzing trace with hash 382291622, now seen corresponding path program 13 times [2020-10-20 01:09:34,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:34,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025166505] [2020-10-20 01:09:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2020-10-20 01:09:34,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025166505] [2020-10-20 01:09:34,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63050995] [2020-10-20 01:09:34,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:09:35,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2020-10-20 01:09:35,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:35,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:35,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988970199] [2020-10-20 01:09:35,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:35,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:35,432 INFO L87 Difference]: Start difference. First operand 378 states and 406 transitions. Second operand 8 states. [2020-10-20 01:09:35,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:35,493 INFO L93 Difference]: Finished difference Result 566 states and 608 transitions. [2020-10-20 01:09:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:35,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 377 [2020-10-20 01:09:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:35,497 INFO L225 Difference]: With dead ends: 566 [2020-10-20 01:09:35,497 INFO L226 Difference]: Without dead ends: 563 [2020-10-20 01:09:35,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-10-20 01:09:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 471. [2020-10-20 01:09:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-10-20 01:09:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 506 transitions. [2020-10-20 01:09:35,531 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 506 transitions. Word has length 377 [2020-10-20 01:09:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:35,532 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 506 transitions. [2020-10-20 01:09:35,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:35,532 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 506 transitions. [2020-10-20 01:09:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-10-20 01:09:35,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:35,541 INFO L422 BasicCegarLoop]: trace histogram [180, 180, 30, 30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2020-10-20 01:09:35,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-20 01:09:35,755 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:35,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:35,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1130841966, now seen corresponding path program 14 times [2020-10-20 01:09:35,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:35,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146713438] [2020-10-20 01:09:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 39110 backedges. 0 proven. 31475 refuted. 0 times theorem prover too weak. 7635 trivial. 0 not checked. [2020-10-20 01:09:36,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146713438] [2020-10-20 01:09:36,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070065672] [2020-10-20 01:09:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:36,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:36,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:09:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39110 backedges. 0 proven. 31475 refuted. 0 times theorem prover too weak. 7635 trivial. 0 not checked. [2020-10-20 01:09:36,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:36,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:09:36,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860324732] [2020-10-20 01:09:36,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:09:36,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:36,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:09:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:36,789 INFO L87 Difference]: Start difference. First operand 471 states and 506 transitions. Second operand 9 states. [2020-10-20 01:09:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:36,856 INFO L93 Difference]: Finished difference Result 567 states and 609 transitions. [2020-10-20 01:09:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:09:36,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 470 [2020-10-20 01:09:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:36,860 INFO L225 Difference]: With dead ends: 567 [2020-10-20 01:09:36,861 INFO L226 Difference]: Without dead ends: 564 [2020-10-20 01:09:36,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-20 01:09:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2020-10-20 01:09:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-10-20 01:09:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 606 transitions. [2020-10-20 01:09:36,905 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 606 transitions. Word has length 470 [2020-10-20 01:09:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:36,906 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 606 transitions. [2020-10-20 01:09:36,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:09:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 606 transitions. [2020-10-20 01:09:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2020-10-20 01:09:36,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:36,918 INFO L422 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2020-10-20 01:09:37,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:37,132 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1072389210, now seen corresponding path program 15 times [2020-10-20 01:09:37,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:37,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929753392] [2020-10-20 01:09:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 0 proven. 48558 refuted. 0 times theorem prover too weak. 7815 trivial. 0 not checked. [2020-10-20 01:09:38,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929753392] [2020-10-20 01:09:38,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390531952] [2020-10-20 01:09:38,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:38,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2020-10-20 01:09:38,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 01:09:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 16183 proven. 0 refuted. 0 times theorem prover too weak. 40190 trivial. 0 not checked. [2020-10-20 01:09:39,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:09:39,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [26] total 26 [2020-10-20 01:09:39,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011388556] [2020-10-20 01:09:39,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 01:09:39,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:39,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 01:09:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-10-20 01:09:39,202 INFO L87 Difference]: Start difference. First operand 564 states and 606 transitions. Second operand 11 states. [2020-10-20 01:09:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:39,282 INFO L93 Difference]: Finished difference Result 564 states and 606 transitions. [2020-10-20 01:09:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:09:39,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 563 [2020-10-20 01:09:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:39,284 INFO L225 Difference]: With dead ends: 564 [2020-10-20 01:09:39,284 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:09:39,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 558 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-10-20 01:09:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:09:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:09:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:09:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:09:39,286 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 563 [2020-10-20 01:09:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:39,287 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:09:39,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 01:09:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:09:39,287 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:09:39,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:39,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:09:41,879 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 683 DAG size of output: 94 [2020-10-20 01:09:42,179 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 9 [2020-10-20 01:09:42,183 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:09:42,183 INFO L277 CegarLoopResult]: At program point L31(lines 15 32) the Hoare annotation is: true [2020-10-20 01:09:42,183 INFO L274 CegarLoopResult]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2020-10-20 01:09:42,183 INFO L270 CegarLoopResult]: At program point L23-3(lines 23 25) the Hoare annotation is: (and (<= ULTIMATE.start_main_~c~0 6) (<= ULTIMATE.start_main_~b~0 5) (<= ULTIMATE.start_main_~a~0 5)) [2020-10-20 01:09:42,183 INFO L274 CegarLoopResult]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2020-10-20 01:09:42,184 INFO L270 CegarLoopResult]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 6) (<= ULTIMATE.start_main_~c~0 6) (< 5 ULTIMATE.start_main_~c~0) (<= ULTIMATE.start_main_~b~0 6) (< 5 ULTIMATE.start_main_~b~0)) [2020-10-20 01:09:42,184 INFO L274 CegarLoopResult]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2020-10-20 01:09:42,184 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-20 01:09:42,184 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:09:42,184 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:09:42,184 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:09:42,184 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-10-20 01:09:42,184 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-10-20 01:09:42,184 INFO L274 CegarLoopResult]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2020-10-20 01:09:42,185 INFO L270 CegarLoopResult]: At program point L22-3(lines 22 26) the Hoare annotation is: (and (<= ULTIMATE.start_main_~c~0 6) (< 5 ULTIMATE.start_main_~c~0) (<= ULTIMATE.start_main_~b~0 6) (<= ULTIMATE.start_main_~a~0 5)) [2020-10-20 01:09:42,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:09:42 BoogieIcfgContainer [2020-10-20 01:09:42,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:09:42,204 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:09:42,204 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:09:42,204 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:09:42,205 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:27" (3/4) ... [2020-10-20 01:09:42,209 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:09:42,220 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-20 01:09:42,220 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:09:42,221 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:09:42,221 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:09:42,265 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:09:42,265 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:09:42,267 INFO L168 Benchmark]: Toolchain (without parser) took 15904.25 ms. Allocated memory was 35.1 MB in the beginning and 266.3 MB in the end (delta: 231.2 MB). Free memory was 12.1 MB in the beginning and 180.3 MB in the end (delta: -168.2 MB). Peak memory consumption was 63.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:42,267 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 33.6 MB. Free memory was 18.6 MB in the beginning and 18.6 MB in the end (delta: 40.2 kB). Peak memory consumption was 40.2 kB. Max. memory is 14.3 GB. [2020-10-20 01:09:42,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.63 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 11.2 MB in the beginning and 24.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:42,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.80 ms. Allocated memory is still 45.1 MB. Free memory was 24.5 MB in the beginning and 23.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:42,269 INFO L168 Benchmark]: Boogie Preprocessor took 22.30 ms. Allocated memory is still 45.1 MB. Free memory was 23.0 MB in the beginning and 21.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:42,269 INFO L168 Benchmark]: RCFGBuilder took 286.81 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 21.6 MB in the beginning and 20.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:42,270 INFO L168 Benchmark]: TraceAbstraction took 15074.89 ms. Allocated memory was 46.7 MB in the beginning and 266.3 MB in the end (delta: 219.7 MB). Free memory was 20.2 MB in the beginning and 184.7 MB in the end (delta: -164.5 MB). Peak memory consumption was 202.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:42,270 INFO L168 Benchmark]: Witness Printer took 61.00 ms. Allocated memory is still 266.3 MB. Free memory was 184.7 MB in the beginning and 180.3 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:42,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 33.6 MB. Free memory was 18.6 MB in the beginning and 18.6 MB in the end (delta: 40.2 kB). Peak memory consumption was 40.2 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 411.63 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 11.2 MB in the beginning and 24.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 36.80 ms. Allocated memory is still 45.1 MB. Free memory was 24.5 MB in the beginning and 23.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 22.30 ms. Allocated memory is still 45.1 MB. Free memory was 23.0 MB in the beginning and 21.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 286.81 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 21.6 MB in the beginning and 20.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 15074.89 ms. Allocated memory was 46.7 MB in the beginning and 266.3 MB in the end (delta: 219.7 MB). Free memory was 20.2 MB in the beginning and 184.7 MB in the end (delta: -164.5 MB). Peak memory consumption was 202.9 MB. Max. memory is 14.3 GB. * Witness Printer took 61.00 ms. Allocated memory is still 266.3 MB. Free memory was 184.7 MB in the beginning and 180.3 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((a <= 6 && c <= 6) && 5 < c) && b <= 6) && 5 < b - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((c <= 6 && 5 < c) && b <= 6) && a <= 5 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (c <= 6 && b <= 5) && a <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.2s, OverallIterations: 19, TraceHistogramMax: 216, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 270 SDslu, 450 SDs, 0 SdLazy, 371 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2681 GetRequests, 2569 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=564occurred 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: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 409 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 40 HoareAnnotationTreeSize, 4 FomulaSimplifications, 83693 FormulaSimplificationTreeSizeReduction, 2.3s HoareSimplificationTime, 4 FomulaSimplificationsInter, 4208 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 5165 NumberOfCodeBlocks, 4619 NumberOfCodeBlocksAsserted, 293 NumberOfCheckSat, 5131 ConstructedInterpolants, 0 QuantifiedInterpolants, 4791211 SizeOfPredicates, 17 NumberOfNonLiveVariables, 3678 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 34 InterpolantComputations, 5 PerfectInterpolantSequences, 124042/302125 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...