/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:58:40,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:58:40,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:58:40,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:58:40,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:58:40,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:58:40,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:58:40,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:58:40,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:58:40,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:58:40,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:58:40,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:58:40,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:58:40,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:58:40,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:58:40,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:58:40,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:58:40,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:58:40,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:58:40,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:58:40,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:58:40,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:58:40,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:58:40,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:58:40,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 03:58:40,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 03:58:40,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 03:58:40,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 03:58:40,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 03:58:40,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 03:58:40,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 03:58:40,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 03:58:40,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 03:58:40,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 03:58:40,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 03:58:40,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 03:58:40,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 03:58:40,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 03:58:40,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:58:40,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:58:40,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:58:40,115 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:58:40,148 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:58:40,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:58:40,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:58:40,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:58:40,152 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:58:40,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:58:40,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:58:40,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:58:40,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:58:40,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:58:40,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:58:40,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:58:40,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:58:40,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:58:40,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:58:40,156 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:58:40,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:58:40,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:58:40,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:58:40,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:58:40,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:58:40,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:58:40,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:58:40,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:58:40,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:58:40,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:58:40,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:58:40,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:58:40,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:58:40,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:58:40,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:58:40,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:58:40,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:58:40,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:58:40,537 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:58:40,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-07-20 03:58:40,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9afdc331/5b74c9a502d14e8a967c2a79f7141cf5/FLAG9eee1dea1 [2020-07-20 03:58:41,167 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:58:41,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-07-20 03:58:41,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9afdc331/5b74c9a502d14e8a967c2a79f7141cf5/FLAG9eee1dea1 [2020-07-20 03:58:41,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9afdc331/5b74c9a502d14e8a967c2a79f7141cf5 [2020-07-20 03:58:41,530 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:58:41,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:58:41,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:58:41,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:58:41,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:58:41,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c5487f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41, skipping insertion in model container [2020-07-20 03:58:41,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:58:41,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:58:41,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:58:41,744 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:58:41,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:58:41,771 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:58:41,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41 WrapperNode [2020-07-20 03:58:41,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:58:41,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:58:41,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:58:41,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:58:41,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (1/1) ... [2020-07-20 03:58:41,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:58:41,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:58:41,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:58:41,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:58:41,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (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 [2020-07-20 03:58:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:58:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:58:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:58:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:58:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:58:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:58:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:58:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:58:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:58:42,158 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:58:42,158 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 03:58:42,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:58:42 BoogieIcfgContainer [2020-07-20 03:58:42,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:58:42,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:58:42,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:58:42,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:58:42,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:58:41" (1/3) ... [2020-07-20 03:58:42,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3204a209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:58:42, skipping insertion in model container [2020-07-20 03:58:42,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:41" (2/3) ... [2020-07-20 03:58:42,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3204a209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:58:42, skipping insertion in model container [2020-07-20 03:58:42,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:58:42" (3/3) ... [2020-07-20 03:58:42,172 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-07-20 03:58:42,183 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:58:42,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:58:42,208 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:58:42,246 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:58:42,247 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:58:42,247 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:58:42,247 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:58:42,247 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:58:42,247 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:58:42,248 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:58:42,248 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:58:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-20 03:58:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 03:58:42,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:42,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:42,276 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-07-20 03:58:42,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:42,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812309084] [2020-07-20 03:58:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:42,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812309084] [2020-07-20 03:58:42,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:42,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 03:58:42,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770794893] [2020-07-20 03:58:42,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 03:58:42,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 03:58:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 03:58:42,427 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-07-20 03:58:42,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:42,448 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-20 03:58:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 03:58:42,450 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 03:58:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:42,460 INFO L225 Difference]: With dead ends: 29 [2020-07-20 03:58:42,460 INFO L226 Difference]: Without dead ends: 12 [2020-07-20 03:58:42,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 03:58:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-20 03:58:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-20 03:58:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-20 03:58:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-20 03:58:42,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-20 03:58:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:42,501 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-20 03:58:42,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 03:58:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-20 03:58:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 03:58:42,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:42,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:42,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:58:42,503 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash -15914692, now seen corresponding path program 1 times [2020-07-20 03:58:42,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:42,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163396561] [2020-07-20 03:58:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:42,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163396561] [2020-07-20 03:58:42,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:42,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:58:42,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629715153] [2020-07-20 03:58:42,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:58:42,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:42,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:58:42,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:58:42,560 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-07-20 03:58:42,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:42,634 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-20 03:58:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:58:42,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 03:58:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:42,637 INFO L225 Difference]: With dead ends: 19 [2020-07-20 03:58:42,638 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 03:58:42,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:58:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 03:58:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-07-20 03:58:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 03:58:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 03:58:42,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-07-20 03:58:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:42,659 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 03:58:42,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:58:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 03:58:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 03:58:42,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:42,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:42,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:58:42,661 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1244203718, now seen corresponding path program 1 times [2020-07-20 03:58:42,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:42,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423977611] [2020-07-20 03:58:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:42,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423977611] [2020-07-20 03:58:42,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967667866] [2020-07-20 03:58:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e2ff9aa 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 [2020-07-20 03:58:42,790 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e2ff9aa issued 2 check-sat command(s) [2020-07-20 03:58:42,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:42,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:58:42,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:42,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:42,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-07-20 03:58:42,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278581048] [2020-07-20 03:58:42,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:58:42,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:42,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:58:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:58:42,831 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-07-20 03:58:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:42,867 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-20 03:58:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:58:42,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-20 03:58:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:42,870 INFO L225 Difference]: With dead ends: 21 [2020-07-20 03:58:42,870 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 03:58:42,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:58:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 03:58:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-20 03:58:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 03:58:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 03:58:42,877 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-20 03:58:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:42,878 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 03:58:42,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:58:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 03:58:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 03:58:42,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:42,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:43,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:58:43,095 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash -513951304, now seen corresponding path program 2 times [2020-07-20 03:58:43,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:43,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036964028] [2020-07-20 03:58:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:43,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036964028] [2020-07-20 03:58:43,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923229084] [2020-07-20 03:58:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@817ff97 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:43,195 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@817ff97 issued 2 check-sat command(s) [2020-07-20 03:58:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:43,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:58:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:43,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:43,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-20 03:58:43,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283231535] [2020-07-20 03:58:43,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:58:43,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:58:43,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:58:43,209 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-07-20 03:58:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:43,239 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-07-20 03:58:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:58:43,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 03:58:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:43,241 INFO L225 Difference]: With dead ends: 23 [2020-07-20 03:58:43,241 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 03:58:43,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:58:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 03:58:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-20 03:58:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 03:58:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 03:58:43,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-20 03:58:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:43,249 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 03:58:43,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:58:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 03:58:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 03:58:43,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:43,250 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:43,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:43,462 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:43,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:43,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1178949302, now seen corresponding path program 3 times [2020-07-20 03:58:43,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:43,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737266829] [2020-07-20 03:58:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:43,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737266829] [2020-07-20 03:58:43,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479389643] [2020-07-20 03:58:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11cec6d4 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 [2020-07-20 03:58:43,581 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11cec6d4 issued 3 check-sat command(s) [2020-07-20 03:58:43,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 03:58:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:43,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:43,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-20 03:58:43,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410031865] [2020-07-20 03:58:43,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:58:43,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:58:43,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:58:43,596 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-07-20 03:58:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:43,631 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-07-20 03:58:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:58:43,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 03:58:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:43,633 INFO L225 Difference]: With dead ends: 25 [2020-07-20 03:58:43,633 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 03:58:43,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:58:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 03:58:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-20 03:58:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 03:58:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 03:58:43,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-20 03:58:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:43,641 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 03:58:43,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:58:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 03:58:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 03:58:43,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:43,642 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:43,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:43,857 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:43,859 INFO L82 PathProgramCache]: Analyzing trace with hash 263826484, now seen corresponding path program 4 times [2020-07-20 03:58:43,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:43,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190448702] [2020-07-20 03:58:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:43,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190448702] [2020-07-20 03:58:43,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635120675] [2020-07-20 03:58:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@446456e8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:44,003 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@446456e8 issued 3 check-sat command(s) [2020-07-20 03:58:44,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:44,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:58:44,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:44,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:44,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 03:58:44,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357598279] [2020-07-20 03:58:44,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:58:44,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:44,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:58:44,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:58:44,022 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-07-20 03:58:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:44,067 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-20 03:58:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:58:44,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-20 03:58:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:44,069 INFO L225 Difference]: With dead ends: 27 [2020-07-20 03:58:44,070 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 03:58:44,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:58:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 03:58:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-20 03:58:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:58:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-20 03:58:44,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-07-20 03:58:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:44,077 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-20 03:58:44,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:58:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-20 03:58:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 03:58:44,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:44,093 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:44,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:44,301 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1299094066, now seen corresponding path program 5 times [2020-07-20 03:58:44,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:44,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133511749] [2020-07-20 03:58:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:44,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133511749] [2020-07-20 03:58:44,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126562633] [2020-07-20 03:58:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31d4f44 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 [2020-07-20 03:58:44,484 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31d4f44 issued 3 check-sat command(s) [2020-07-20 03:58:44,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 03:58:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:44,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:44,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-07-20 03:58:44,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582861557] [2020-07-20 03:58:44,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:58:44,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:58:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:58:44,505 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-07-20 03:58:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:44,554 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-20 03:58:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:58:44,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-20 03:58:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:44,555 INFO L225 Difference]: With dead ends: 29 [2020-07-20 03:58:44,555 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 03:58:44,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:58:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 03:58:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-20 03:58:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 03:58:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-20 03:58:44,561 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-07-20 03:58:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:44,561 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-20 03:58:44,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:58:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-20 03:58:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:58:44,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:44,563 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:44,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:58:44,771 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:44,772 INFO L82 PathProgramCache]: Analyzing trace with hash -241172304, now seen corresponding path program 6 times [2020-07-20 03:58:44,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:44,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336519231] [2020-07-20 03:58:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:44,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336519231] [2020-07-20 03:58:44,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267948995] [2020-07-20 03:58:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@230da3ad No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-20 03:58:44,926 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@230da3ad issued 3 check-sat command(s) [2020-07-20 03:58:44,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:44,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:58:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:44,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:44,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-07-20 03:58:44,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214491855] [2020-07-20 03:58:44,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:58:44,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:44,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:58:44,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:58:44,945 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-07-20 03:58:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:44,987 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-20 03:58:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:58:44,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-07-20 03:58:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:44,989 INFO L225 Difference]: With dead ends: 31 [2020-07-20 03:58:44,989 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 03:58:44,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:58:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 03:58:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-20 03:58:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 03:58:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-07-20 03:58:44,995 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-07-20 03:58:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:44,996 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-07-20 03:58:44,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:58:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-07-20 03:58:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 03:58:44,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:44,997 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:45,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:45,212 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1326563246, now seen corresponding path program 7 times [2020-07-20 03:58:45,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:45,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695695920] [2020-07-20 03:58:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:45,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695695920] [2020-07-20 03:58:45,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211423057] [2020-07-20 03:58:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d4c581f 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 [2020-07-20 03:58:45,354 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d4c581f issued 3 check-sat command(s) [2020-07-20 03:58:45,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 03:58:45,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:45,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:45,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-07-20 03:58:45,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600500189] [2020-07-20 03:58:45,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:58:45,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:58:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:58:45,371 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-07-20 03:58:45,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:45,422 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-07-20 03:58:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:58:45,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-20 03:58:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:45,425 INFO L225 Difference]: With dead ends: 32 [2020-07-20 03:58:45,425 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 03:58:45,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:58:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 03:58:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 03:58:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:58:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 03:58:45,439 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-07-20 03:58:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:45,439 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 03:58:45,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:58:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 03:58:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:58:45,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:45,442 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:45,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:45,655 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:45,656 INFO L82 PathProgramCache]: Analyzing trace with hash 386905900, now seen corresponding path program 8 times [2020-07-20 03:58:45,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:45,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567028148] [2020-07-20 03:58:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:45,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567028148] [2020-07-20 03:58:45,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496071852] [2020-07-20 03:58:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38e6458a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:45,933 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38e6458a issued 4 check-sat command(s) [2020-07-20 03:58:45,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:45,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 03:58:45,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:45,969 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 03:58:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:46,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:46,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-20 03:58:46,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239887598] [2020-07-20 03:58:46,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:58:46,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:46,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:58:46,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:58:46,037 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-20 03:58:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:46,176 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-20 03:58:46,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:58:46,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-07-20 03:58:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:46,178 INFO L225 Difference]: With dead ends: 34 [2020-07-20 03:58:46,178 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 03:58:46,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:58:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 03:58:46,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 03:58:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 03:58:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-20 03:58:46,186 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-07-20 03:58:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:46,186 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-20 03:58:46,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:58:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-20 03:58:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:58:46,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:46,188 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:46,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 03:58:46,404 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash -680671446, now seen corresponding path program 9 times [2020-07-20 03:58:46,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:46,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872768647] [2020-07-20 03:58:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bd4232d [2020-07-20 03:58:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:46,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872768647] [2020-07-20 03:58:46,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:46,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-20 03:58:46,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366179249] [2020-07-20 03:58:46,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:58:46,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:58:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:58:46,528 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2020-07-20 03:58:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:46,565 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-20 03:58:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:58:46,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-20 03:58:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:46,566 INFO L225 Difference]: With dead ends: 29 [2020-07-20 03:58:46,566 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:58:46,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:58:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:58:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:58:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:58:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:58:46,568 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-07-20 03:58:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:46,569 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:58:46,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:58:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:58:46,569 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:58:46,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 03:58:46,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:58:46,697 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:58:46,697 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:58:46,697 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:58:46,697 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:58:46,697 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:58:46,697 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:58:46,698 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-20 03:58:46,698 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-20 03:58:46,698 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-07-20 03:58:46,698 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-07-20 03:58:46,702 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= 8 main_~sn~0) (<= 5 main_~i~0) (<= main_~sn~0 8) (<= main_~i~0 5)) (and (<= main_~sn~0 0) (<= 0 main_~sn~0) (<= main_~i~0 1) (<= 1 main_~i~0)) (and (<= main_~i~0 3) (<= 4 main_~sn~0) (<= 3 main_~i~0) (<= main_~sn~0 4)) (and (<= main_~sn~0 6) (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0)) (and (<= main_~sn~0 16) (<= 9 main_~i~0) (<= 16 main_~sn~0)) (and (<= 14 main_~sn~0) (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14)) (and (<= main_~sn~0 10) (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 12 main_~sn~0) (<= main_~i~0 7) (<= 7 main_~i~0) (<= main_~sn~0 12))) [2020-07-20 03:58:46,702 INFO L264 CegarLoopResult]: At program point L13-4(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (<= 16 main_~sn~0)) [2020-07-20 03:58:46,703 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 03:58:46,703 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 03:58:46,703 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 03:58:46,703 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 03:58:46,703 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 03:58:46,703 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 03:58:46,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:58:46 BoogieIcfgContainer [2020-07-20 03:58:46,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:58:46,732 INFO L168 Benchmark]: Toolchain (without parser) took 5197.92 ms. Allocated memory was 138.4 MB in the beginning and 246.9 MB in the end (delta: 108.5 MB). Free memory was 103.0 MB in the beginning and 186.7 MB in the end (delta: -83.6 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:46,733 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 03:58:46,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.93 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:46,735 INFO L168 Benchmark]: Boogie Preprocessor took 113.33 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 182.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:46,740 INFO L168 Benchmark]: RCFGBuilder took 275.46 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 170.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:46,741 INFO L168 Benchmark]: TraceAbstraction took 4563.77 ms. Allocated memory was 202.4 MB in the beginning and 246.9 MB in the end (delta: 44.6 MB). Free memory was 169.8 MB in the beginning and 186.7 MB in the end (delta: -16.9 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:46,754 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.93 ms. Allocated memory is still 138.4 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.33 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 182.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.46 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 170.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4563.77 ms. Allocated memory was 202.4 MB in the beginning and 246.9 MB in the end (delta: 44.6 MB). Free memory was 169.8 MB in the beginning and 186.7 MB in the end (delta: -16.9 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 13]: Loop Invariant Derived loop invariant: ((((((((((8 <= sn && 5 <= i) && sn <= 8) && i <= 5) || (((sn <= 0 && 0 <= sn) && i <= 1) && 1 <= i)) || (((i <= 3 && 4 <= sn) && 3 <= i) && sn <= 4)) || (((sn <= 6 && i <= 4) && 6 <= sn) && 4 <= i)) || ((sn <= 16 && 9 <= i) && 16 <= sn)) || (((14 <= sn && i <= 8) && 8 <= i) && sn <= 14)) || (((sn <= 10 && 10 <= sn) && 6 <= i) && i <= 6)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((12 <= sn && i <= 7) && 7 <= i) && sn <= 12) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 37 SDslu, 380 SDs, 0 SdLazy, 276 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 352 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 333 ConstructedInterpolants, 0 QuantifiedInterpolants, 17729 SizeOfPredicates, 8 NumberOfNonLiveVariables, 312 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 81/489 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...