/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:34,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:54:34,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:54:34,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:54:34,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:54:34,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:54:34,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:54:34,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:54:34,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:54:34,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:54:34,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:54:34,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:54:34,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:34,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:34,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:34,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:34,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:34,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:34,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:34,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:34,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:34,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:34,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:34,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:34,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 14:54:34,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:34,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:34,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:34,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:54:34,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:34,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:34,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:34,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:34,569 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:34,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:34,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:34,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:34,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:34,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:34,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:34,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:34,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:34,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:34,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:34,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:34,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:34,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:34,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:34,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:34,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:34,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:34,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:34,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:34,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:34,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:34,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:34,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:34,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:34,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:54:35,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:35,098 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:35,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:35,104 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:35,105 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:35,106 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-09-24 14:54:35,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/459c5a3ec/d4eb66264d70438e881eccc6b294b2aa/FLAG0042b63a9 [2020-09-24 14:54:35,768 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:35,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-09-24 14:54:35,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/459c5a3ec/d4eb66264d70438e881eccc6b294b2aa/FLAG0042b63a9 [2020-09-24 14:54:36,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/459c5a3ec/d4eb66264d70438e881eccc6b294b2aa [2020-09-24 14:54:36,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:36,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:36,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:36,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:36,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:36,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373efb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36, skipping insertion in model container [2020-09-24 14:54:36,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:36,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:36,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:36,388 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:36,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:36,423 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:36,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36 WrapperNode [2020-09-24 14:54:36,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:36,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:36,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:36,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:36,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (1/1) ... [2020-09-24 14:54:36,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:36,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:36,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:36,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:36,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 14:54:36,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:36,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:36,631 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-09-24 14:54:36,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:54:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-09-24 14:54:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:36,855 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:36,855 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 14:54:36,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:36 BoogieIcfgContainer [2020-09-24 14:54:36,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:36,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:36,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:36,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:36,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:36" (1/3) ... [2020-09-24 14:54:36,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26720900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:36, skipping insertion in model container [2020-09-24 14:54:36,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:36" (2/3) ... [2020-09-24 14:54:36,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26720900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:36, skipping insertion in model container [2020-09-24 14:54:36,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:36" (3/3) ... [2020-09-24 14:54:36,880 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-09-24 14:54:36,892 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:36,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:36,928 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:36,960 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:36,961 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:36,961 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:36,961 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:36,961 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:36,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:36,962 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:36,962 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:36,987 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-24 14:54:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 14:54:36,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:36,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:36,997 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:37,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1379859160, now seen corresponding path program 1 times [2020-09-24 14:54:37,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:37,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082059746] [2020-09-24 14:54:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:54:37,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082059746] [2020-09-24 14:54:37,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:37,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:54:37,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371016370] [2020-09-24 14:54:37,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:37,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:37,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:37,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:37,416 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 7 states. [2020-09-24 14:54:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:37,653 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-24 14:54:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:54:37,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-24 14:54:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:37,671 INFO L225 Difference]: With dead ends: 50 [2020-09-24 14:54:37,671 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 14:54:37,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 14:54:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-24 14:54:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 14:54:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-24 14:54:37,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-09-24 14:54:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:37,741 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-24 14:54:37,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-24 14:54:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 14:54:37,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:37,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:37,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:37,745 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2056866127, now seen corresponding path program 1 times [2020-09-24 14:54:37,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:37,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400485719] [2020-09-24 14:54:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:54:37,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400485719] [2020-09-24 14:54:37,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:37,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 14:54:37,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615397188] [2020-09-24 14:54:37,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:37,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:37,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:37,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:37,877 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-09-24 14:54:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:38,018 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-09-24 14:54:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:54:38,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-24 14:54:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:38,021 INFO L225 Difference]: With dead ends: 39 [2020-09-24 14:54:38,021 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 14:54:38,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 14:54:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-09-24 14:54:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 14:54:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-24 14:54:38,032 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2020-09-24 14:54:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:38,033 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-24 14:54:38,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-24 14:54:38,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 14:54:38,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:38,035 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-24 14:54:38,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:38,036 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:38,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1274124978, now seen corresponding path program 1 times [2020-09-24 14:54:38,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:38,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700011758] [2020-09-24 14:54:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 14:54:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 14:54:38,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700011758] [2020-09-24 14:54:38,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:38,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 14:54:38,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066120471] [2020-09-24 14:54:38,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:54:38,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:38,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:54:38,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:38,198 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-09-24 14:54:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:38,303 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-24 14:54:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:54:38,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-09-24 14:54:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:38,306 INFO L225 Difference]: With dead ends: 55 [2020-09-24 14:54:38,306 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 14:54:38,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 14:54:38,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-24 14:54:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 14:54:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-24 14:54:38,316 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 36 [2020-09-24 14:54:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:38,316 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-24 14:54:38,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:54:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-24 14:54:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 14:54:38,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:38,319 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2020-09-24 14:54:38,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:54:38,319 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2043121517, now seen corresponding path program 1 times [2020-09-24 14:54:38,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:38,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557479138] [2020-09-24 14:54:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 14:54:38,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557479138] [2020-09-24 14:54:38,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:38,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 14:54:38,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579009295] [2020-09-24 14:54:38,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:54:38,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:38,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:54:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:38,529 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 11 states. [2020-09-24 14:54:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:38,855 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-09-24 14:54:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 14:54:38,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-24 14:54:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:38,861 INFO L225 Difference]: With dead ends: 50 [2020-09-24 14:54:38,862 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 14:54:38,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 14:54:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-24 14:54:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 14:54:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-09-24 14:54:38,886 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 37 [2020-09-24 14:54:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:38,888 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-09-24 14:54:38,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:54:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-09-24 14:54:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 14:54:38,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:38,896 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:38,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:54:38,896 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1985616609, now seen corresponding path program 1 times [2020-09-24 14:54:38,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:38,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090283315] [2020-09-24 14:54:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-24 14:54:39,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090283315] [2020-09-24 14:54:39,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:39,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 14:54:39,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873714733] [2020-09-24 14:54:39,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:54:39,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:54:39,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:39,065 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 6 states. [2020-09-24 14:54:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:39,219 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-09-24 14:54:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:54:39,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-09-24 14:54:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:39,221 INFO L225 Difference]: With dead ends: 76 [2020-09-24 14:54:39,224 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 14:54:39,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 14:54:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-24 14:54:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 14:54:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-09-24 14:54:39,239 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 56 [2020-09-24 14:54:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:39,240 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-09-24 14:54:39,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:54:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-09-24 14:54:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 14:54:39,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:39,242 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 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] [2020-09-24 14:54:39,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:54:39,243 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 847598467, now seen corresponding path program 2 times [2020-09-24 14:54:39,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:39,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956559576] [2020-09-24 14:54:39,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:54:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-24 14:54:39,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956559576] [2020-09-24 14:54:39,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:39,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:54:39,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487454822] [2020-09-24 14:54:39,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:39,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:39,391 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 7 states. [2020-09-24 14:54:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:39,505 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-09-24 14:54:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:54:39,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-09-24 14:54:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:39,507 INFO L225 Difference]: With dead ends: 77 [2020-09-24 14:54:39,508 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 14:54:39,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 14:54:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-24 14:54:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 14:54:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-09-24 14:54:39,517 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 54 [2020-09-24 14:54:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:39,517 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-09-24 14:54:39,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-09-24 14:54:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 14:54:39,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:39,519 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 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] [2020-09-24 14:54:39,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:54:39,520 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1275966376, now seen corresponding path program 3 times [2020-09-24 14:54:39,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:39,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855502509] [2020-09-24 14:54:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:54:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 14:54:39,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855502509] [2020-09-24 14:54:39,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:39,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:54:39,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560031879] [2020-09-24 14:54:39,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:54:39,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:39,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:54:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:39,780 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 13 states. [2020-09-24 14:54:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:40,167 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-09-24 14:54:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 14:54:40,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-24 14:54:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:40,170 INFO L225 Difference]: With dead ends: 60 [2020-09-24 14:54:40,170 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 14:54:40,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 14:54:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-09-24 14:54:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 14:54:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-09-24 14:54:40,179 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 55 [2020-09-24 14:54:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:40,180 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-09-24 14:54:40,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:54:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-09-24 14:54:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 14:54:40,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:40,182 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:40,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:54:40,183 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:40,183 INFO L82 PathProgramCache]: Analyzing trace with hash -778718797, now seen corresponding path program 4 times [2020-09-24 14:54:40,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:40,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456745955] [2020-09-24 14:54:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:54:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:54:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 57 proven. 70 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-24 14:54:40,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456745955] [2020-09-24 14:54:40,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:40,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 14:54:40,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294461921] [2020-09-24 14:54:40,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:54:40,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:40,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:54:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:40,394 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 8 states. [2020-09-24 14:54:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:40,564 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2020-09-24 14:54:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:54:40,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-24 14:54:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:40,566 INFO L225 Difference]: With dead ends: 98 [2020-09-24 14:54:40,566 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 14:54:40,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 14:54:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-09-24 14:54:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 14:54:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-09-24 14:54:40,577 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 90 [2020-09-24 14:54:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:40,577 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-09-24 14:54:40,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:54:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-09-24 14:54:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-24 14:54:40,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:40,580 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:40,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:54:40,581 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash 237402259, now seen corresponding path program 5 times [2020-09-24 14:54:40,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:40,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691817270] [2020-09-24 14:54:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:54:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:54:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:54:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:54:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 130 proven. 176 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-09-24 14:54:40,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691817270] [2020-09-24 14:54:40,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:40,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:54:40,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682895367] [2020-09-24 14:54:40,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:54:40,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:40,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:54:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:40,904 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-09-24 14:54:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:41,181 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2020-09-24 14:54:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 14:54:41,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-09-24 14:54:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:41,185 INFO L225 Difference]: With dead ends: 126 [2020-09-24 14:54:41,185 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 14:54:41,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:54:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 14:54:41,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-09-24 14:54:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 14:54:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-09-24 14:54:41,207 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 126 [2020-09-24 14:54:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:41,208 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-09-24 14:54:41,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:54:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-09-24 14:54:41,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 14:54:41,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:41,212 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:41,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:54:41,212 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:41,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1698410615, now seen corresponding path program 6 times [2020-09-24 14:54:41,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:41,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028143884] [2020-09-24 14:54:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-24 14:54:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 14:54:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 14:54:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 14:54:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 8 proven. 109 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-09-24 14:54:41,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028143884] [2020-09-24 14:54:41,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:41,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:54:41,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943033974] [2020-09-24 14:54:41,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:54:41,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:54:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:41,630 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 15 states. [2020-09-24 14:54:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:42,069 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2020-09-24 14:54:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 14:54:42,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2020-09-24 14:54:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:42,074 INFO L225 Difference]: With dead ends: 70 [2020-09-24 14:54:42,074 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 14:54:42,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:54:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 14:54:42,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 14:54:42,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 14:54:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 14:54:42,078 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2020-09-24 14:54:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:42,078 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 14:54:42,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:54:42,079 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 14:54:42,079 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 14:54:42,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:54:42,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 14:54:42,348 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-09-24 14:54:42,348 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-09-24 14:54:42,349 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-09-24 14:54:42,349 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-24 14:54:42,349 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 14:54:42,349 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 2) (<= 1 |fibonacci_#t~ret0|) .cse0 (<= 2 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse0 (<= 3 |fibonacci_#in~n|)))) [2020-09-24 14:54:42,349 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-09-24 14:54:42,349 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-09-24 14:54:42,350 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-09-24 14:54:42,350 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 14:54:42,350 INFO L268 CegarLoopResult]: For program point L20-4(line 20) no Hoare annotation was computed. [2020-09-24 14:54:42,350 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-09-24 14:54:42,350 INFO L268 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-09-24 14:54:42,350 INFO L268 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-09-24 14:54:42,350 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 14:54:42,350 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 14:54:42,351 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 14:54:42,351 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 14:54:42,351 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 14:54:42,351 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 14:54:42,351 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-24 14:54:42,351 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-09-24 14:54:42,352 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-09-24 14:54:42,352 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-09-24 14:54:42,352 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-09-24 14:54:42,352 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-09-24 14:54:42,352 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-24 14:54:42,352 INFO L268 CegarLoopResult]: For program point L30-2(line 30) no Hoare annotation was computed. [2020-09-24 14:54:42,352 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-09-24 14:54:42,352 INFO L268 CegarLoopResult]: For program point L30-3(line 30) no Hoare annotation was computed. [2020-09-24 14:54:42,353 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-24 14:54:42,353 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-09-24 14:54:42,353 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-09-24 14:54:42,353 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-09-24 14:54:42,353 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-09-24 14:54:42,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:54:42 BoogieIcfgContainer [2020-09-24 14:54:42,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:54:42,365 INFO L168 Benchmark]: Toolchain (without parser) took 6247.82 ms. Allocated memory was 147.3 MB in the beginning and 282.1 MB in the end (delta: 134.7 MB). Free memory was 103.1 MB in the beginning and 225.3 MB in the end (delta: -122.2 MB). Peak memory consumption was 138.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:42,366 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 14:54:42,366 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.37 ms. Allocated memory is still 147.3 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:42,367 INFO L168 Benchmark]: Boogie Preprocessor took 118.39 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.0 MB in the beginning and 182.0 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:42,368 INFO L168 Benchmark]: RCFGBuilder took 321.31 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:42,369 INFO L168 Benchmark]: TraceAbstraction took 5492.79 ms. Allocated memory was 202.9 MB in the beginning and 282.1 MB in the end (delta: 79.2 MB). Free memory was 168.2 MB in the beginning and 225.3 MB in the end (delta: -57.2 MB). Peak memory consumption was 148.3 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:42,373 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.37 ms. Allocated memory is still 147.3 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.39 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.0 MB in the beginning and 182.0 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.31 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5492.79 ms. Allocated memory was 202.9 MB in the beginning and 282.1 MB in the end (delta: 79.2 MB). Free memory was 168.2 MB in the beginning and 225.3 MB in the end (delta: -57.2 MB). Peak memory consumption was 148.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.1s, OverallIterations: 10, TraceHistogramMax: 13, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 265 SDtfs, 327 SDslu, 1022 SDs, 0 SdLazy, 980 SolverSat, 131 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 297 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 29 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 80 PreInvPairs, 99 NumberOfFragments, 39 HoareAnnotationTreeSize, 80 FomulaSimplifications, 291 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 215 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 583 NumberOfCodeBlocks, 583 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 573 ConstructedInterpolants, 0 QuantifiedInterpolants, 94359 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 675/1096 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...