/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/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:34:09,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:34:09,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:34:09,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 03:34:09,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:34:09,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:34:09,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:34:09,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:34:09,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:34:09,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:34:09,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:34:09,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:34:09,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:34:09,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:34:09,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:34:09,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:34:09,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:34:09,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:34:09,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:34:09,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:34:09,785 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 03:34:09,801 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:34:09,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:34:09,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:34:09,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:34:09,803 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:34:09,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:34:09,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:34:09,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:34:09,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:34:09,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:34:09,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:34:09,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:34:09,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:34:09,805 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:34:09,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:34:09,806 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:34:09,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:34:09,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:34:09,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:34:09,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:34:09,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:34:09,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:34:09,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:34:09,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:34:09,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:34:09,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:34:09,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:34:09,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:34:09,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:34:09,809 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 03:34:10,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:34:10,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:34:10,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:34:10,126 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:34:10,127 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:34:10,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-07-20 03:34:10,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7d1c9b7/d055858abe6c4263b05342fdaf8a532c/FLAGd33cb3b67 [2020-07-20 03:34:10,644 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:34:10,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-07-20 03:34:10,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7d1c9b7/d055858abe6c4263b05342fdaf8a532c/FLAGd33cb3b67 [2020-07-20 03:34:11,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7d1c9b7/d055858abe6c4263b05342fdaf8a532c [2020-07-20 03:34:11,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:34:11,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:34:11,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:34:11,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:34:11,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:34:11,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3313f816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11, skipping insertion in model container [2020-07-20 03:34:11,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:34:11,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:34:11,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:34:11,311 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:34:11,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:34:11,341 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:34:11,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11 WrapperNode [2020-07-20 03:34:11,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:34:11,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:34:11,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:34:11,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:34:11,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (1/1) ... [2020-07-20 03:34:11,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:34:11,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:34:11,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:34:11,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:34:11,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (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 03:34:11,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:34:11,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:34:11,539 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 03:34:11,539 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 03:34:11,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:34:11,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:34:11,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:34:11,540 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 03:34:11,540 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 03:34:11,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:34:11,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:34:11,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:34:11,765 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:34:11,766 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:34:11,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:34:11 BoogieIcfgContainer [2020-07-20 03:34:11,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:34:11,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:34:11,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:34:11,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:34:11,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:34:11" (1/3) ... [2020-07-20 03:34:11,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f101592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:34:11, skipping insertion in model container [2020-07-20 03:34:11,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:34:11" (2/3) ... [2020-07-20 03:34:11,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f101592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:34:11, skipping insertion in model container [2020-07-20 03:34:11,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:34:11" (3/3) ... [2020-07-20 03:34:11,814 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-07-20 03:34:11,845 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:34:11,864 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:34:11,893 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:34:11,919 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:34:11,919 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:34:11,920 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:34:11,920 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:34:11,920 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:34:11,920 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:34:11,920 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:34:11,920 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:34:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 03:34:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:34:11,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:11,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:11,947 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 03:34:11,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:11,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159717589] [2020-07-20 03:34:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,179 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 03:34:12,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159717589] [2020-07-20 03:34:12,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:34:12,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:34:12,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507184698] [2020-07-20 03:34:12,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:34:12,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:12,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:34:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:34:12,210 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 03:34:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:12,320 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 03:34:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:34:12,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:34:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:12,336 INFO L225 Difference]: With dead ends: 44 [2020-07-20 03:34:12,337 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:34:12,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:34:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:34:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:34:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:34:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 03:34:12,407 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 03:34:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:12,408 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 03:34:12,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:34:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 03:34:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 03:34:12,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:12,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:12,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:34:12,411 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 03:34:12,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:12,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636268047] [2020-07-20 03:34:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,482 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 03:34:12,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636268047] [2020-07-20 03:34:12,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:34:12,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:34:12,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136290196] [2020-07-20 03:34:12,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:34:12,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:12,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:34:12,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:34:12,488 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 03:34:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:12,609 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 03:34:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:34:12,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 03:34:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:12,615 INFO L225 Difference]: With dead ends: 36 [2020-07-20 03:34:12,615 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 03:34:12,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:34:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 03:34:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 03:34:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:34:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 03:34:12,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 03:34:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:12,646 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 03:34:12,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:34:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 03:34:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:34:12,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:12,650 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:12,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:34:12,651 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:12,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 03:34:12,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:12,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412469033] [2020-07-20 03:34:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:12,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412469033] [2020-07-20 03:34:12,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821685753] [2020-07-20 03:34:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b147d58 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 03:34:12,851 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b147d58 issued 3 check-sat command(s) [2020-07-20 03:34:12,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:12,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:34:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:12,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:12,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 03:34:12,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786343764] [2020-07-20 03:34:12,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:34:12,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:12,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:34:12,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:34:12,952 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 03:34:13,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:13,209 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-20 03:34:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:34:13,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 03:34:13,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:13,212 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:34:13,212 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 03:34:13,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:34:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 03:34:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-20 03:34:13,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 03:34:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-20 03:34:13,230 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-20 03:34:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:13,230 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-20 03:34:13,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:34:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-20 03:34:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 03:34:13,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:13,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:13,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:34:13,451 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 03:34:13,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:13,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240386982] [2020-07-20 03:34:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:13,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240386982] [2020-07-20 03:34:13,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313581414] [2020-07-20 03:34:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217ba21a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:13,594 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@217ba21a issued 3 check-sat command(s) [2020-07-20 03:34:13,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:34:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:34:13,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:13,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 03:34:13,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021312817] [2020-07-20 03:34:13,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:34:13,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:13,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:34:13,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:34:13,638 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-20 03:34:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:13,851 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-20 03:34:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:34:13,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 03:34:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:13,859 INFO L225 Difference]: With dead ends: 54 [2020-07-20 03:34:13,859 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 03:34:13,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:34:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 03:34:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-20 03:34:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:34:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-20 03:34:13,873 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-20 03:34:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:13,873 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-20 03:34:13,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:34:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-20 03:34:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 03:34:13,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:13,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:14,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:14,090 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:14,091 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 03:34:14,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:14,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820689862] [2020-07-20 03:34:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 03:34:14,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820689862] [2020-07-20 03:34:14,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127609953] [2020-07-20 03:34:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c3b3b13 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 03:34:14,243 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c3b3b13 issued 3 check-sat command(s) [2020-07-20 03:34:14,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:14,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:14,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 03:34:14,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:14,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-20 03:34:14,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925840952] [2020-07-20 03:34:14,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:34:14,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:34:14,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:34:14,326 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-20 03:34:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:14,654 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-20 03:34:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:34:14,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 03:34:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:14,658 INFO L225 Difference]: With dead ends: 108 [2020-07-20 03:34:14,658 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:34:14,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:34:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:34:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 03:34:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 03:34:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-20 03:34:14,677 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-20 03:34:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:14,677 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-20 03:34:14,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:34:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-20 03:34:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 03:34:14,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:14,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:14,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:14,895 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 03:34:14,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:14,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764609334] [2020-07-20 03:34:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 03:34:15,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764609334] [2020-07-20 03:34:15,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834395316] [2020-07-20 03:34:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a6d006d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:15,090 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a6d006d issued 3 check-sat command(s) [2020-07-20 03:34:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:15,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 03:34:15,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:15,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 03:34:15,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595036051] [2020-07-20 03:34:15,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:34:15,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:34:15,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:34:15,177 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-20 03:34:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:15,600 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-20 03:34:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:34:15,601 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-20 03:34:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:15,605 INFO L225 Difference]: With dead ends: 180 [2020-07-20 03:34:15,605 INFO L226 Difference]: Without dead ends: 120 [2020-07-20 03:34:15,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:34:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-20 03:34:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-20 03:34:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 03:34:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-20 03:34:15,637 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-20 03:34:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:15,637 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-20 03:34:15,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:34:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-20 03:34:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 03:34:15,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:15,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:15,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:15,856 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 03:34:15,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:15,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270826991] [2020-07-20 03:34:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 03:34:16,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270826991] [2020-07-20 03:34:16,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614447624] [2020-07-20 03:34:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f9a4a1e 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 03:34:16,131 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f9a4a1e issued 3 check-sat command(s) [2020-07-20 03:34:16,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:34:16,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 03:34:16,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:16,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-07-20 03:34:16,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391239586] [2020-07-20 03:34:16,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:34:16,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:16,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:34:16,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:34:16,224 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-07-20 03:34:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:16,819 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-20 03:34:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:34:16,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 03:34:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:16,827 INFO L225 Difference]: With dead ends: 258 [2020-07-20 03:34:16,828 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 03:34:16,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:34:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 03:34:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-20 03:34:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 03:34:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-20 03:34:16,860 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-20 03:34:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:16,861 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-20 03:34:16,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:34:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-20 03:34:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 03:34:16,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:16,870 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:17,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:34:17,072 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-07-20 03:34:17,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:17,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395860493] [2020-07-20 03:34:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-07-20 03:34:17,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395860493] [2020-07-20 03:34:17,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275409168] [2020-07-20 03:34:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@593f03a7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:17,431 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@593f03a7 issued 4 check-sat command(s) [2020-07-20 03:34:17,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:17,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 03:34:17,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:17,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-07-20 03:34:17,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227997229] [2020-07-20 03:34:17,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:34:17,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:17,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:34:17,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:34:17,523 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 14 states. [2020-07-20 03:34:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:18,043 INFO L93 Difference]: Finished difference Result 244 states and 474 transitions. [2020-07-20 03:34:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:34:18,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-07-20 03:34:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:18,047 INFO L225 Difference]: With dead ends: 244 [2020-07-20 03:34:18,047 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 03:34:18,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:34:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 03:34:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-07-20 03:34:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 03:34:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2020-07-20 03:34:18,070 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 82 [2020-07-20 03:34:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:18,070 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2020-07-20 03:34:18,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:34:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2020-07-20 03:34:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 03:34:18,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:18,077 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:18,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:18,291 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:18,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 1 times [2020-07-20 03:34:18,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:18,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191296498] [2020-07-20 03:34:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-07-20 03:34:18,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191296498] [2020-07-20 03:34:18,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844933447] [2020-07-20 03:34:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@799e6894 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 03:34:18,836 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@799e6894 issued 4 check-sat command(s) [2020-07-20 03:34:18,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:18,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:34:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 49 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-07-20 03:34:18,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:18,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2020-07-20 03:34:18,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682506667] [2020-07-20 03:34:18,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:34:18,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:34:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:34:18,953 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 18 states. [2020-07-20 03:34:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:19,789 INFO L93 Difference]: Finished difference Result 238 states and 428 transitions. [2020-07-20 03:34:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 03:34:19,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2020-07-20 03:34:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:19,795 INFO L225 Difference]: With dead ends: 238 [2020-07-20 03:34:19,795 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 03:34:19,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 03:34:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 03:34:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2020-07-20 03:34:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 03:34:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-07-20 03:34:19,834 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 136 [2020-07-20 03:34:19,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:19,834 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-07-20 03:34:19,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:34:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-07-20 03:34:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-20 03:34:19,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:19,837 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:20,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:20,052 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 2 times [2020-07-20 03:34:20,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:20,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751020623] [2020-07-20 03:34:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:34:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-20 03:34:20,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751020623] [2020-07-20 03:34:20,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326407336] [2020-07-20 03:34:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61873edc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:34:20,423 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61873edc issued 4 check-sat command(s) [2020-07-20 03:34:20,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:34:20,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:34:20,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:34:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-20 03:34:20,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:34:20,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-07-20 03:34:20,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695739945] [2020-07-20 03:34:20,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:34:20,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:34:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:34:20,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:34:20,515 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 15 states. [2020-07-20 03:34:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:34:21,023 INFO L93 Difference]: Finished difference Result 228 states and 340 transitions. [2020-07-20 03:34:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:34:21,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-07-20 03:34:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:34:21,027 INFO L225 Difference]: With dead ends: 228 [2020-07-20 03:34:21,027 INFO L226 Difference]: Without dead ends: 129 [2020-07-20 03:34:21,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-07-20 03:34:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-20 03:34:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-07-20 03:34:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 03:34:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2020-07-20 03:34:21,063 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 95 [2020-07-20 03:34:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:34:21,068 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2020-07-20 03:34:21,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:34:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2020-07-20 03:34:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 03:34:21,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:34:21,073 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:34:21,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 03:34:21,287 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:34:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:34:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-07-20 03:34:21,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:34:21,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828181007] [2020-07-20 03:34:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48f62a4e [2020-07-20 03:34:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:34:21,327 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:34:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:34:21,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:34:21,401 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:34:21,401 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:34:21,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 03:34:21,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:34:21 BoogieIcfgContainer [2020-07-20 03:34:21,488 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:34:21,491 INFO L168 Benchmark]: Toolchain (without parser) took 10457.06 ms. Allocated memory was 137.9 MB in the beginning and 314.6 MB in the end (delta: 176.7 MB). Free memory was 102.8 MB in the beginning and 206.0 MB in the end (delta: -103.2 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:21,492 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 03:34:21,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.33 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 92.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:21,494 INFO L168 Benchmark]: Boogie Preprocessor took 128.88 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 92.8 MB in the beginning and 181.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:21,502 INFO L168 Benchmark]: RCFGBuilder took 304.24 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 168.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:21,507 INFO L168 Benchmark]: TraceAbstraction took 9697.93 ms. Allocated memory was 202.9 MB in the beginning and 314.6 MB in the end (delta: 111.7 MB). Free memory was 167.5 MB in the beginning and 206.0 MB in the end (delta: -38.5 MB). Peak memory consumption was 73.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:34:21,513 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.33 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 92.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.88 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 92.8 MB in the beginning and 181.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.24 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 168.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9697.93 ms. Allocated memory was 202.9 MB in the beginning and 314.6 MB in the end (delta: 111.7 MB). Free memory was 167.5 MB in the beginning and 206.0 MB in the end (delta: -38.5 MB). Peak memory consumption was 73.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; VAL [x=5] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L37] int result = fibo1(x); [L38] COND TRUE result == 5 VAL [result=5, x=5] [L39] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.4s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 436 SDslu, 1733 SDs, 0 SdLazy, 2429 SolverSat, 427 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred 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: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 123 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 1134 NumberOfCodeBlocks, 1092 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1007 ConstructedInterpolants, 0 QuantifiedInterpolants, 138229 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1059 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 1303/1700 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...